diff --git a/README.md b/README.md
index 4305da6..6c33cdb 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Cambridge
 
 Welcome to Cambridge, the next open-source falling-block game engine!
 
-The project is written and maintained exclusively by [Milla](https://github.com/MillaBasset), [joezeng](https://github.com/joezeng) and [Oshisaure](https://github.com/oshisaure)!  
+The project is written and maintained exclusively by [Milla](https://github.com/MillaBasset), [joezeng](https://github.com/joezeng) and [Oshisaure](https://github.com/oshisaure)!
 
 The Discord server has been reopened! https://discord.gg/AADZUmgsph
 
@@ -16,11 +16,11 @@ Playing the game
 
 ### Windows
 
-You do not need LÖVE on Windows, as it comes bundled with the program.  
+You do not need LÖVE on Windows, as it comes bundled with the program.
 
 #### Stable release
 
-To get the stable release, simply download either `cambridge-win32.zip` (32-bit) or `cambridge-windows.zip` (64-bit) in the [latest release](https://github.com/MillaBasset/cambridge/releases/latest).  
+To get the stable release, simply download either `cambridge-win32.zip` (32-bit) or `cambridge-windows.zip` (64-bit) in the [latest release](https://github.com/MillaBasset/cambridge/releases/latest).
 
 All assets needed are bundled with the executable.
 
@@ -28,11 +28,11 @@ All assets needed are bundled with the executable.
 
 If you want the bleeding edge version, download [this](https://github.com/MillaBasset/cambridge/archive/master.zip). Extract the ZIP to a folder of your choosing.
 
-Assuming you're on a 64-bit system, you can double-click `start_win64.bat` to run the game. If that doesn't work, open a Command Prompt where you extracted Cambridge and run:
+If you're on Windows, you can double-click `start.bat` to run the game. If that doesn't work, open a Command Prompt where you extracted Cambridge and run:
 
 	dist\windows\love.exe .
 
-If you're on a 32-bit system, you'll want to double-click `start_win32.bat`. If that doesn't work, run this instead:
+If that doesn't work, run this instead, still using Command Prompt where you extracted Cambridge:
 
 	dist\win32\love.exe .
 
@@ -107,4 +107,4 @@ Other Notable Games
 - [Puzzle Trial](https://kagamine-rin.itch.io/puzzle-trial) by Rin
 - [stackfuse](https://github.com/sinefuse/stackfuse) by sinefuse
 
-![Cambridge Logo](https://cdn.discordapp.com/attachments/625496179433668635/763363717730664458/Icon_2.png)
+![Cambridge Logo](https://cdn.discordapp.com/attachments/827186653772644452/1077674343544393820/Icon_2.png)
diff --git a/funcs.lua b/funcs.lua
index dfd8aa3..831e97f 100644
--- a/funcs.lua
+++ b/funcs.lua
@@ -60,6 +60,9 @@ function formatTime(frames)
 	min  = math.floor(frames/3600)
 	sec  = math.floor(frames/60) % 60
 	hund = math.floor(frames/.6) % 100
+	if frames == 15641 then
+		hund = math.ceil(frames/.6) % 100
+	end
 	str = string.format("%02d:%02d.%02d", min, sec, hund)
 	return str
 end
diff --git a/load/bgm.lua b/load/bgm.lua
index 9e28b94..feb075d 100644
--- a/load/bgm.lua
+++ b/load/bgm.lua
@@ -6,14 +6,17 @@ bgm = {
 }
 
 local current_bgm = nil
+local pitch = 1
 local bgm_locked = false
-local unfocused = false
 
 function switchBGM(sound, subsound)
+	if bgm_locked then
+		return
+	end
 	if current_bgm ~= nil then
 		current_bgm:stop()
 	end
-	if bgm_locked or config.bgm_volume <= 0 then
+	if config.bgm_volume <= 0 then
 		current_bgm = nil
 	elseif sound ~= nil then
 		if subsound ~= nil then
@@ -67,25 +70,28 @@ function processBGMFadeout(dt)
 			fadeout_time = 0
 			fading_bgm = false
 		end
-		current_bgm:setVolume(fadeout_time * config.bgm_volume / total_fadeout_time)
+		current_bgm:setVolume(
+			fadeout_time * config.bgm_volume / total_fadeout_time
+		)
 	end
 end
 
-function pauseBGM(f)
-	if f then
-		unfocused = true
-	end
+function pauseBGM()
 	if current_bgm ~= nil then
 		current_bgm:pause()
 	end
 end
 
-function resumeBGM(f)
-	if f and scene.paused and unfocused then
-		unfocused = false
-		return
-	end
+function resumeBGM()
 	if current_bgm ~= nil then
 		current_bgm:play()
+		current_bgm:setPitch(pitch)
+	end
+end
+
+function pitchBGM(new_pitch)
+	pitch = new_pitch
+	if current_bgm ~= nil then
+		current_bgm:setPitch(pitch)
 	end
 end
diff --git a/load/fonts.lua b/load/fonts.lua
index 36ae0c3..8a37d8d 100644
--- a/load/fonts.lua
+++ b/load/fonts.lua
@@ -26,8 +26,18 @@ font_3x5_4 = love.graphics.newImageFont(
 	-4
 )
 
-font_8x11 = love.graphics.newImageFont(
-	"res/fonts/8x11_medium.png",
-	"0123456789:.",
+-- this would be font_8x11 with the other one as 8x11_2
+-- but that would break compatibility :(
+font_8x11_small = love.graphics.newImageFont(
+	"res/fonts/8x11.png",
+	" 0123456789:;.,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" ..
+	"?!/\\^@$%<=>()*-+[]_&",
+	1
+)
+
+font_8x11 = love.graphics.newImageFont(
+	"res/fonts/8x11_medium.png",
+	" 0123456789:;.,ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" ..
+	"?!/\\^@$%<=>()*-+[]_&",
 	1
 )
diff --git a/load/graphics.lua b/load/graphics.lua
index 066ce72..154b886 100644
--- a/load/graphics.lua
+++ b/load/graphics.lua
@@ -1,31 +1,106 @@
-backgrounds = {
-	[0] = love.graphics.newImage("res/backgrounds/0.png"),
-	love.graphics.newImage("res/backgrounds/100.png"),
-	love.graphics.newImage("res/backgrounds/200.png"),
-	love.graphics.newImage("res/backgrounds/300.png"),
-	love.graphics.newImage("res/backgrounds/400.png"),
-	love.graphics.newImage("res/backgrounds/500.png"),
-	love.graphics.newImage("res/backgrounds/600.png"),
-	love.graphics.newImage("res/backgrounds/700.png"),
-	love.graphics.newImage("res/backgrounds/800.png"),
-	love.graphics.newImage("res/backgrounds/900.png"),
-	love.graphics.newImage("res/backgrounds/1000.png"),
-	love.graphics.newImage("res/backgrounds/1100.png"),
-	love.graphics.newImage("res/backgrounds/1200.png"),
-	love.graphics.newImage("res/backgrounds/1300.png"),
-	love.graphics.newImage("res/backgrounds/1400.png"),
-	love.graphics.newImage("res/backgrounds/1500.png"),
-	love.graphics.newImage("res/backgrounds/1600.png"),
-	love.graphics.newImage("res/backgrounds/1700.png"),
-	love.graphics.newImage("res/backgrounds/1800.png"),
-	love.graphics.newImage("res/backgrounds/1900.png"),
-	title = love.graphics.newImage("res/backgrounds/title.png"),
-	title_no_icon = love.graphics.newImage("res/backgrounds/title-no-icon.jpg"),
-	title_night = love.graphics.newImage("res/backgrounds/title-night.jpg"),
-	snow = love.graphics.newImage("res/backgrounds/snow.png"),
-	input_config = love.graphics.newImage("res/backgrounds/options-input.png"),
-	game_config = love.graphics.newImage("res/backgrounds/options-game.png"),
+named_backgrounds = {
+	"title", "title_no_icon", "title_night",
+	"snow", "options_input", "options_game"
 }
+current_playing_bgs = {}
+extended_bgs = {}
+image_formats = {".jpg", ".png"}
+bgpath = "res/backgrounds/"
+dir = love.filesystem.getDirectoryItems(bgpath)
+
+backgrounds = {}
+
+local function loadExtendedBgs()
+	extended_bgs = require("res.backgrounds.extend_section_bg")
+end
+
+-- error handling for if there is no extend_section_bg
+if pcall(loadExtendedBgs) then end
+
+-- helper method to populate backgrounds
+local function createBackgroundIfExists(name, file_name)
+	local format_index = 1
+
+	-- see if background is an extension of another background
+	if extended_bgs[file_name] ~= nil then
+		copy_bg = extended_bgs[file_name]
+		copy_bg = copy_bg / 100
+		backgrounds[name] = backgrounds[copy_bg]
+		return true
+	end
+
+	-- try creating image backgrounds
+	while format_index <= #image_formats do
+		for num, existing_file in pairs(dir) do
+			if existing_file == (file_name..image_formats[format_index]) then
+				local tempBgPath = bgpath .. file_name .. image_formats[format_index]
+				backgrounds[name] = love.graphics.newImage(tempBgPath)
+				return true
+			end
+		end
+		format_index = format_index + 1
+	end
+
+	-- try creating video background
+	if love.filesystem.getInfo(bgpath .. file_name .. ".ogv") then
+		for num, existing_file in pairs(dir) do
+			if existing_file == (file_name..".ogv") then
+				local tempBgPath = bgpath .. file_name .. ".ogv"
+				backgrounds[name] = love.graphics.newVideo(
+					tempBgPath, {["audio"] = false}
+				)
+				-- you can set audio to true, but the video will not loop
+				-- properly if audio extends beyond video frames
+				return true
+			end
+		end
+	end
+	return false
+end
+
+local function stopOtherBgs(bg)
+	if #current_playing_bgs == 0 and bg:typeOf("Video") then
+		current_playing_bgs[#current_playing_bgs+1] = bg
+	end
+
+	if #current_playing_bgs >= 1 then
+		while current_playing_bgs[1] ~= bg and #current_playing_bgs >= 1 do
+			current_playing_bgs[1]:pause()
+			current_playing_bgs[1]:rewind()
+			table.remove(current_playing_bgs, 1)
+		end
+	end
+
+end
+
+function fetchBackgroundAndLoop(id)
+	bg = backgrounds[id]
+
+	if bg:typeOf("Video") and not bg:isPlaying() then
+		bg:rewind()
+		bg:play()
+	end
+
+	stopOtherBgs(bg)
+
+	return bg
+end
+
+-- create section backgrounds
+local section = 0
+while (createBackgroundIfExists(section, section*100)) do
+	section = section + 1
+end
+
+-- create named backgrounds
+local nbgIndex = 1
+while nbgIndex <= #named_backgrounds do
+	createBackgroundIfExists(
+		named_backgrounds[nbgIndex],
+		string.gsub(named_backgrounds[nbgIndex], "_", "-")
+	)
+	nbgIndex = nbgIndex + 1
+end
 
 -- in order, the colors are:
 -- red, orange, yellow, green, cyan, blue
@@ -122,4 +197,17 @@ misc_graphics = {
 	strike = love.graphics.newImage("res/img/strike.png"),
 	santa = love.graphics.newImage("res/img/santa.png"),
 	icon = love.graphics.newImage("res/img/cambridge_transparent.png")
-}
\ No newline at end of file
+}
+
+-- utility function to allow any size background to be used
+-- this will stretch the background to 4:3 aspect ratio
+function drawBackground(id)
+	local bg_object = fetchBackgroundAndLoop(id)
+	local width = bg_object:getWidth()
+	local height = bg_object:getHeight()
+	love.graphics.draw(
+		bg_object,
+		0, 0, 0,
+		640 / width, 480 / height
+	)
+end
\ No newline at end of file
diff --git a/load/version.lua b/load/version.lua
index 0328391..cca4f97 100644
--- a/load/version.lua
+++ b/load/version.lua
@@ -1 +1 @@
-version = "v0.3.1"
\ No newline at end of file
+version = "v0.3.4"
\ No newline at end of file
diff --git a/main.lua b/main.lua
index f0e17c0..8abc042 100644
--- a/main.lua
+++ b/main.lua
@@ -1,5 +1,4 @@
 function love.load()
-	math.randomseed(os.time())
 	highscores = {}
 	love.graphics.setDefaultFilter("linear", "nearest")
 	require "load.rpc"
@@ -25,6 +24,11 @@ function love.load()
 	-- used for screenshots
 	GLOBAL_CANVAS = love.graphics.newCanvas()
 
+	-- aliasing to prevent people using math.random by accident
+	math.random = love.math.random
+	math.randomseed = love.math.setRandomSeed
+	math.randomseed(os.time())
+
 	-- init config
 	initConfig()
 	config.depth_3d = 100 -- TODO add a setting for this to the menu
@@ -111,8 +115,8 @@ function love.keypressed(key, scancode)
 		saveConfig()
 		scene.restart_message = true
 		if config.secret then playSE("mode_decide")
-		else playSE("erase") end
-		-- f12 is reserved for saving screenshots
+		else playSE("erase", "single") end
+	-- f12 is reserved for saving screenshots
 	elseif scancode == "f12" then
 		local ss_name = os.date("ss/%Y-%m-%d_%H-%M-%S.png")
 		local info = love.filesystem.getInfo("ss", "directory")
@@ -278,22 +282,17 @@ function love.wheelmoved(x, y)
 	scene:onInputPress({input=nil, type="wheel", x=x, y=y})
 end
 
-function love.focus(f)
-	if f then
-		resumeBGM(true)
-	else
-		pauseBGM(true)
-	end
-end
-
 function love.resize(w, h)
-		GLOBAL_CANVAS:release()
-		GLOBAL_CANVAS = love.graphics.newCanvas(w, h)
+	GLOBAL_CANVAS:release()
+	GLOBAL_CANVAS = love.graphics.newCanvas(w, h)
 end
 
+-- higher values of TARGET_FPS will make the game run "faster"
+-- since the game is mostly designed for 60 FPS
 local TARGET_FPS = 60
 local FRAME_DURATION = 1.0 / TARGET_FPS
 
+-- custom run function; optimizes game by syncing draw/update calls
 function love.run()
 	if love.load then love.load(love.arg.parseGameArguments(arg), arg) end
 
diff --git a/res/backgrounds/extend_section_bg.lua b/res/backgrounds/extend_section_bg.lua
new file mode 100644
index 0000000..33dbb4c
--- /dev/null
+++ b/res/backgrounds/extend_section_bg.lua
@@ -0,0 +1,14 @@
+-- ex: extend_section_bg[100] = 0
+--     extend_section_bg[200] = 0
+-- the video background associated with section 0 will continue playing into 100 and 200 without restarting.
+-- will also cause any existing level 100, 200 backgrounds specified to NOT render.
+
+-- please also note that you cannot currently extend any "named" backgrounds, such as "title" and "options-input"
+
+extend_section_bg = {}
+
+-- extend_section_bg[100] = 0
+-- extend_section_bg[200] = 0
+-- remove the dashes 
+
+return extend_section_bg
\ No newline at end of file
diff --git a/res/fonts/3x5.xcf b/res/fonts/3x5.xcf
deleted file mode 100644
index 7b6fdcb..0000000
Binary files a/res/fonts/3x5.xcf and /dev/null differ
diff --git a/res/fonts/8x11.png b/res/fonts/8x11.png
index 2693141..7546e3d 100644
Binary files a/res/fonts/8x11.png and b/res/fonts/8x11.png differ
diff --git a/res/fonts/8x11_medium.png b/res/fonts/8x11_medium.png
index 54d170b..4ebcafc 100644
Binary files a/res/fonts/8x11_medium.png and b/res/fonts/8x11_medium.png differ
diff --git a/res/fonts/8x12.xcf b/res/fonts/8x12.xcf
deleted file mode 100644
index 746c877..0000000
Binary files a/res/fonts/8x12.xcf and /dev/null differ
diff --git a/scene/credits.lua b/scene/credits.lua
index 63fbc98..eacc9d5 100644
--- a/scene/credits.lua
+++ b/scene/credits.lua
@@ -16,9 +16,7 @@ function CreditsScene:new()
 end
 
 function CreditsScene:update()
-    if love.window.hasFocus() then
-        self.frames = self.frames + 1
-    end
+    self.frames = self.frames + 1
     if self.frames >= 2100 * self.scroll_speed then
         playSE("mode_decide")
         scene = TitleScene()
@@ -32,11 +30,7 @@ function CreditsScene:render()
     local offset = self.frames / self.scroll_speed
 
     love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds[19],
-		0, 0, 0,
-		0.5, 0.5
-    )
+	drawBackground(19)
 
     love.graphics.setFont(font_3x5_4)
     love.graphics.print("Cambridge Credits", 320, 500 - offset)
diff --git a/scene/game.lua b/scene/game.lua
index e3015ea..21e4c91 100644
--- a/scene/game.lua
+++ b/scene/game.lua
@@ -25,6 +25,8 @@ function GameScene:new(game_mode, ruleset, inputs)
 		hold=false,
 	}
 	self.paused = false
+	self.game.pause_count = 0
+	self.game.pause_time = 0
 	DiscordRPC:update({
 		details = self.game.rpc_details,
 		state = self.game.name,
@@ -33,7 +35,9 @@ function GameScene:new(game_mode, ruleset, inputs)
 end
 
 function GameScene:update()
-	if love.window.hasFocus() and not self.paused then
+	if self.paused then
+		self.game.pause_time = self.game.pause_time + 1
+	else
 		local inputs = {}
 		for input, value in pairs(self.inputs) do
 			inputs[input] = value
@@ -50,6 +54,16 @@ end
 
 function GameScene:render()
 	self.game:draw(self.paused)
+	if self.game.pause_time > 0 or self.game.pause_count > 0 then
+		love.graphics.setColor(1, 1, 1, 1)
+		love.graphics.setFont(font_3x5_2)
+		love.graphics.printf(string.format(
+			"%d PAUSE%s (%s)",
+			self.game.pause_count,
+			self.game.pause_count == 1 and "" or "S",
+			formatTime(self.game.pause_time)
+		), 0, 0, 635, "right")
+	end
 end
 
 function GameScene:onInputPress(e)
@@ -67,12 +81,17 @@ function GameScene:onInputPress(e)
 		scene = e.input == "retry" and GameScene(self.retry_mode, self.retry_ruleset, self.secret_inputs) or ModeSelectScene()
 	elseif e.input == "retry" then
 		switchBGM(nil)
+		pitchBGM(1)
 		self.game:onExit()
 		scene = GameScene(self.retry_mode, self.retry_ruleset, self.secret_inputs)
 	elseif e.input == "pause" and not (self.game.game_over or self.game.completed) then
 		self.paused = not self.paused
-		if self.paused then pauseBGM()
-		else resumeBGM() end
+		if self.paused then
+			pauseBGM()
+			self.game.pause_count = self.game.pause_count + 1
+		else
+			resumeBGM()
+		end
 	elseif e.input == "menu_back" then
 		self.game:onExit()
 		scene = ModeSelectScene()
diff --git a/scene/game_config.lua b/scene/game_config.lua
index 2276ad6..68b4aff 100644
--- a/scene/game_config.lua
+++ b/scene/game_config.lua
@@ -45,11 +45,7 @@ end
 
 function ConfigScene:render()
 	love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds["game_config"],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground("options_game")
 
 	love.graphics.setFont(font_3x5_4)
 	love.graphics.print("GAME SETTINGS", 80, 40)
diff --git a/scene/input_config.lua b/scene/input_config.lua
index 7b488f8..230c514 100644
--- a/scene/input_config.lua
+++ b/scene/input_config.lua
@@ -20,11 +20,7 @@ function ConfigScene:update() end
 
 function ConfigScene:render()
     love.graphics.setColor(1, 1, 1, 1)
-    love.graphics.draw(
-		backgrounds["input_config"],
-		0, 0, 0,
-		0.5, 0.5
-    )
+    drawBackground("options_input")
 
     love.graphics.setFont(font_3x5_4)
     love.graphics.print("INPUT CONFIG", 80, 40)
diff --git a/scene/key_config.lua b/scene/key_config.lua
index 419ebb5..a062b2e 100644
--- a/scene/key_config.lua
+++ b/scene/key_config.lua
@@ -45,11 +45,7 @@ end
 
 function KeyConfigScene:render()
 	love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds["input_config"],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground("options_input")
 
 	love.graphics.setFont(font_3x5_2)
 	for i, input in ipairs(configurable_inputs) do
diff --git a/scene/mode_select.lua b/scene/mode_select.lua
index b394896..329de3c 100755
--- a/scene/mode_select.lua
+++ b/scene/mode_select.lua
@@ -58,11 +58,7 @@ function ModeSelectScene:update()
 end
 
 function ModeSelectScene:render()
-	love.graphics.draw(
-		backgrounds[0],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground(0)
 
 	love.graphics.draw(misc_graphics["select_mode"], 20, 40)
 
diff --git a/scene/replay.lua b/scene/replay.lua
index f1ca2c0..d6f7d18 100644
--- a/scene/replay.lua
+++ b/scene/replay.lua
@@ -6,6 +6,9 @@ ReplayScene.title = "Replay"
 
 function ReplayScene:new(replay, game_mode, ruleset)
 	config.gamesettings = replay["gamesettings"]
+	if replay["delayed_auto_shift"] then config.das = replay["delayed_auto_shift"] end
+	if replay["auto_repeat_rate"] then config.arr = replay["auto_repeat_rate"] end
+	if replay["das_cut_delay"] then config.dcd = replay["das_cut_delay"] end
 	love.math.setRandomSeed(replay["random_low"], replay["random_high"])
 	love.math.setRandomState(replay["random_state"])
 	self.retry_replay = replay
@@ -29,8 +32,13 @@ function ReplayScene:new(replay, game_mode, ruleset)
 		hold=false,
 	}
 	self.paused = false
+	self.game.pause_count = replay["pause_count"]
+	self.game.pause_time = replay["pause_time"]
 	self.replay = deepcopy(replay)
 	self.replay_index = 1
+	self.replay_speed = 1
+	self.show_invisible = false
+	self.frame_steps = 0
 	DiscordRPC:update({
 		details = "Viewing a replay",
 		state = self.game.name,
@@ -39,18 +47,25 @@ function ReplayScene:new(replay, game_mode, ruleset)
 end
 
 function ReplayScene:update()
-	if love.window.hasFocus() and not self.paused then
-		self.inputs = self.replay["inputs"][self.replay_index]["inputs"]
-		self.replay["inputs"][self.replay_index]["frames"] = self.replay["inputs"][self.replay_index]["frames"] - 1
-		if self.replay["inputs"][self.replay_index]["frames"] == 0 and self.replay_index < table.getn(self.replay["inputs"]) then
-			self.replay_index = self.replay_index + 1
+	local frames_left = self.replay_speed
+	if not self.paused or self.frame_steps > 0 then
+		if self.frame_steps > 0 then
+			self.frame_steps = self.frame_steps - 1
 		end
-		local input_copy = {}
-		for input, value in pairs(self.inputs) do
-			input_copy[input] = value
+		while frames_left > 0 do
+			frames_left = frames_left - 1
+			self.inputs = self.replay["inputs"][self.replay_index]["inputs"]
+			self.replay["inputs"][self.replay_index]["frames"] = self.replay["inputs"][self.replay_index]["frames"] - 1
+			if self.replay["inputs"][self.replay_index]["frames"] == 0 and self.replay_index < table.getn(self.replay["inputs"]) then
+				self.replay_index = self.replay_index + 1
+			end
+			local input_copy = {}
+			for input, value in pairs(self.inputs) do
+				input_copy[input] = value
+			end
+			self.game:update(input_copy, self.ruleset)
+			self.game.grid:update()
 		end
-		self.game:update(input_copy, self.ruleset)
-		self.game.grid:update()
 		DiscordRPC:update({
 			details = "Viewing a replay",
 			state = self.game.name,
@@ -64,6 +79,30 @@ function ReplayScene:render()
 	love.graphics.setColor(1, 1, 1, 1)
 	love.graphics.setFont(font_3x5_3)
 	love.graphics.printf("REPLAY", 0, 0, 635, "right")
+	local pauses_y_coordinate = 23
+	if self.replay_speed > 1 then
+		pauses_y_coordinate = pauses_y_coordinate + 20
+		love.graphics.printf(self.replay_speed.."X", 0, 20, 635, "right")
+	end
+	love.graphics.setFont(font_3x5_2)
+	if self.game.pause_time and self.game.pause_count then
+		if self.game.pause_time > 0 or self.game.pause_count > 0 then
+			love.graphics.printf(string.format(
+				"%d PAUSE%s (%s)",
+				self.game.pause_count,
+				self.game.pause_count == 1 and "" or "S",
+				formatTime(self.game.pause_time)
+			), 0, pauses_y_coordinate, 635, "right")
+		end
+	else
+		love.graphics.printf("?? PAUSES (--:--.--)", 0, pauses_y_coordinate, 635, "right")
+	end
+	if self.show_invisible then 
+		self.game.grid:draw()
+		love.graphics.setColor(1, 1, 1, 1)
+		love.graphics.setFont(font_3x5_3)
+		love.graphics.printf("SHOW INVIS", 64, 60, 160, "center")
+	end
 end
 
 function ReplayScene:onInputPress(e)
@@ -72,6 +111,8 @@ function ReplayScene:onInputPress(e)
 		e.input == "menu_decide" or
 		e.input == "retry"
  	) then
+		switchBGM(nil)
+		pitchBGM(1)
 		self.game:onExit()
 		loadSave()
 		love.math.setRandomSeed(os.time())
@@ -86,6 +127,23 @@ function ReplayScene:onInputPress(e)
 		self.paused = not self.paused
 		if self.paused then pauseBGM()
 		else resumeBGM() end
+	--frame step
+	elseif e.input == "rotate_left" then
+		self.frame_steps = self.frame_steps + 1
+	elseif e.input == "left" then
+		self.replay_speed = self.replay_speed - 1
+		if self.replay_speed < 1 then
+			self.replay_speed = 1
+		end
+		pitchBGM(self.replay_speed)
+	elseif e.input == "right" then
+		self.replay_speed = self.replay_speed + 1
+		if self.replay_speed > 99 then
+			self.replay_speed = 99
+		end
+		pitchBGM(self.replay_speed)
+	elseif e.input == "hold" then
+		self.show_invisible = not self.show_invisible
 	end
 end
 
diff --git a/scene/replay_select.lua b/scene/replay_select.lua
index 7ae3140..4101075 100644
--- a/scene/replay_select.lua
+++ b/scene/replay_select.lua
@@ -14,8 +14,12 @@ function ReplaySelectScene:new()
 	replay_file_list = love.filesystem.getDirectoryItems("replays")
 	for i=1,#replay_file_list do
 		local data = love.filesystem.read("replays/"..replay_file_list[i])
-		local new_replay = binser.deserialize(data)[1]
-		replays[#replays + 1] = new_replay
+		local success, new_replay = pcall(
+			function() return binser.deserialize(data)[1] end
+		)
+		if success then
+			replays[#replays + 1] = new_replay
+		end
 	end
 	table.sort(replays, function(a, b)
 		return a["timestamp"] > b["timestamp"]
@@ -43,8 +47,6 @@ function ReplaySelectScene:new()
 end
 
 function ReplaySelectScene:update()
-	switchBGM(nil) -- experimental
-	
 	if self.das_up or self.das_down or self.das_left or self.das_right then
 		self.das = self.das + 1
 	else
@@ -74,16 +76,12 @@ function ReplaySelectScene:update()
 end
 
 function ReplaySelectScene:render()
-	love.graphics.draw(
-		backgrounds[0],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground(0)
 
 	-- Same graphic as mode select
 	--love.graphics.draw(misc_graphics["select_mode"], 20, 40)
 
-	love.graphics.setFont(font_3x5_4)
+	love.graphics.setFont(font_8x11)
 	love.graphics.print("SELECT REPLAY", 20, 35)
 
 	if self.display_warning then
diff --git a/scene/settings.lua b/scene/settings.lua
index eaa7361..a51d8c1 100644
--- a/scene/settings.lua
+++ b/scene/settings.lua
@@ -29,11 +29,7 @@ function SettingsScene:update() end
 
 function SettingsScene:render()
     love.graphics.setColor(1, 1, 1, 1)
-    love.graphics.draw(
-		backgrounds["game_config"],
-		0, 0, 0,
-		0.5, 0.5
-    )
+    drawBackground("options_game")
 
     love.graphics.setFont(font_3x5_4)
     love.graphics.print("SETTINGS", 80, 40)
diff --git a/scene/stick_config.lua b/scene/stick_config.lua
index 3e7be01..d8bc03c 100644
--- a/scene/stick_config.lua
+++ b/scene/stick_config.lua
@@ -46,11 +46,7 @@ end
 
 function StickConfigScene:render()
 	love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds["input_config"],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground("options_input")
 
 	love.graphics.setFont(font_3x5_2)
 	for i, input in ipairs(configurable_inputs) do
diff --git a/scene/title.lua b/scene/title.lua
index a7973c5..c2c54db 100644
--- a/scene/title.lua
+++ b/scene/title.lua
@@ -74,11 +74,7 @@ local block_offsets = {
 function TitleScene:render()
 	love.graphics.setFont(font_3x5_4)
 	love.graphics.setColor(1, 1, 1, 1 - self.snow_bg_opacity)
-	love.graphics.draw(
-		backgrounds["title_no_icon"], -- title, title_night
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground("title_no_icon") -- title, title_night
 
 	-- 490, 192
 	for _, b in ipairs(block_offsets) do
@@ -109,11 +105,7 @@ function TitleScene:render()
 
 	love.graphics.setFont(font_3x5_2)
 	love.graphics.setColor(1, 1, 1, self.snow_bg_opacity)
-	love.graphics.draw(
-		backgrounds["snow"],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground("snow")
 
 	love.graphics.draw(
 		misc_graphics["santa"],
diff --git a/scene/tuning.lua b/scene/tuning.lua
index ef0f4ee..42bc65a 100644
--- a/scene/tuning.lua
+++ b/scene/tuning.lua
@@ -34,11 +34,7 @@ end
 
 function TuningScene:render()
     love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds["game_config"],
-		0, 0, 0,
-		0.5, 0.5
-    )
+	drawBackground("options_game")
 
     love.graphics.setColor(1, 1, 1, 0.5)
     love.graphics.rectangle("fill", 75, 98 + self.highlight * 75, 400, 33)
diff --git a/start.bat b/start.bat
new file mode 100644
index 0000000..aa7685b
--- /dev/null
+++ b/start.bat
@@ -0,0 +1,7 @@
+@echo OFF
+
+rem This solution of detecting the current CPU taken from here: https://stackoverflow.com/a/24590583
+reg Query "HKLM\Hardware\Description\System\CentralProcessor\0" | find /i "x86" > NUL && set CURRENT_CPU=32BIT || set CURRENT_CPU=64BIT
+
+if %CURRENT_CPU%==32BIT .\dist\win32\love.exe .
+if %CURRENT_CPU%==64BIT .\dist\windows\love.exe .
\ No newline at end of file
diff --git a/start_win32.bat b/start_win32.bat
deleted file mode 100644
index 5d2ac86..0000000
--- a/start_win32.bat
+++ /dev/null
@@ -1 +0,0 @@
-dist\win32\love.exe .
\ No newline at end of file
diff --git a/start_win64.bat b/start_win64.bat
deleted file mode 100644
index acdd477..0000000
--- a/start_win64.bat
+++ /dev/null
@@ -1 +0,0 @@
-dist\windows\love.exe .
\ No newline at end of file
diff --git a/tetris/components/grid.lua b/tetris/components/grid.lua
index c4659c3..ad388f6 100644
--- a/tetris/components/grid.lua
+++ b/tetris/components/grid.lua
@@ -232,12 +232,15 @@ function Grid:applyBigPiece(piece)
 	end
 end
 
-function Grid:checkForBravo(cleared_row_count)
-	for i = 0, self.height - 1 - cleared_row_count do
-				for j = 0, self.width - 1 do
-						if self:isOccupied(j, i) then return false end
-				end
+-- places where you see this take an argument used the old, buggy method
+function Grid:checkForBravo()
+	for i = 0, self.height - 1 do
+		if not self:isRowFull(i+1) then
+			for j = 0, self.width - 1 do
+				if self:isOccupied(j, i) then return false end
+			end
 		end
+	end
 	return true
 end
 
diff --git a/tetris/modes/big_a2.lua b/tetris/modes/big_a2.lua
index 73d8034..51d06ff 100755
--- a/tetris/modes/big_a2.lua
+++ b/tetris/modes/big_a2.lua
@@ -10,41 +10,10 @@ BigA2Game.tagline = "Big blocks in the most celebrated TGM mode!"
 function BigA2Game:new()
 	BigA2Game.super:new()
 	self.big_mode = true
-end
-
-function BigA2Game:updateScore(level, drop_bonus, cleared_lines)
-	cleared_lines = cleared_lines / 2
-	if not self.clear then
-		self:updateGrade(cleared_lines)
-		if cleared_lines >= 4 then
-			self.tetris_count = self.tetris_count + 1
-		end
-		if self.grid:checkForBravo(cleared_lines) then self.bravo = 4 else self.bravo = 1 end
-		if cleared_lines > 0 then
-			self.combo = self.combo + (cleared_lines - 1) * 2
-			self.score = self.score + (
-				(math.ceil((level + cleared_lines) / 4) + drop_bonus) *
-				cleared_lines * self.combo * self.bravo
-			)
-		else
-			self.combo = 1
-		end
-		self.drop_bonus = 0
-	else self.lines = self.lines + cleared_lines end
-end
-
-function BigA2Game:onLineClear(cleared_row_count)
-	cleared_row_count = cleared_row_count / 2
-	self:updateSectionTimes(self.level, self.level + cleared_row_count)
-	self.level = math.min(self.level + cleared_row_count, 999)
-	if self.level == 999 and not self.clear then
-		self.clear = true
-		self.grid:clear()
-		if self:qualifiesForMRoll() then self.grade = 32 end
-		self.roll_frames = -150
+	local getClearedRowCount = self.grid.getClearedRowCount
+	self.grid.getClearedRowCount = function(self)
+		return getClearedRowCount(self) / 2
 	end
-	self.lock_drop = self.level >= 900
-	self.lock_hard_drop = self.level >= 900
 end
 
 return BigA2Game
\ No newline at end of file
diff --git a/tetris/modes/gamemode.lua b/tetris/modes/gamemode.lua
index 5d38e3c..1da020e 100644
--- a/tetris/modes/gamemode.lua
+++ b/tetris/modes/gamemode.lua
@@ -136,25 +136,27 @@ function GameMode:saveReplay()
 	replay["lines"] = self.lines
 	replay["gamesettings"] = config.gamesettings
 	replay["secret_inputs"] = self.secret_inputs
+	replay["delayed_auto_shift"] = config.das
+	replay["auto_repeat_rate"] = config.arr
+	replay["das_cut_delay"] = config.dcd
 	replay["timestamp"] = os.time()
+	replay["pause_count"] = self.pause_count
+	replay["pause_time"] = self.pause_time
 	if love.filesystem.getInfo("replays") == nil then
 		love.filesystem.createDirectory("replays")
 	end
-	local replay_files = love.filesystem.getDirectoryItems("replays")
-	-- Select replay filename that doesn't collide with an existing one
+	local init_name = string.format("replays/%s.crp", os.date("%Y-%m-%d_%H-%M-%S"))
+	local replay_name = init_name
 	local replay_number = 0
-	local collision = true
-	while collision do
-		collision = false
-		replay_number = replay_number + 1
-		for key, file in pairs(replay_files) do
-			if file == replay_number..".crp" then
-				collision = true
-				break
-			end
+	while true do
+		if love.filesystem.getInfo(replay_name, "file") then
+			replay_number = replay_number + 1
+			replay_name = string.format("%s (%d)", init_name, replay_number)
+		else
+			break
 		end
 	end
-	love.filesystem.write("replays/"..replay_number..".crp", binser.serialize(replay))
+	love.filesystem.write(replay_name, binser.serialize(replay))
 end
 
 function GameMode:addReplayInput(inputs)
@@ -178,6 +180,9 @@ function GameMode:update(inputs, ruleset)
 	if self.game_over or self.completed then
 		if self.save_replay and self.game_over_frames == 0 then
 			self:saveReplay()
+
+			-- ensure replays are only saved once per game, incase self.game_over_frames == 0 for longer than one frame
+			self.save_replay = false
 		end
 		self.game_over_frames = self.game_over_frames + 1
 		return
@@ -399,6 +404,7 @@ end
 
 function GameMode:onGameOver()
 	switchBGM(nil)
+	pitchBGM(1)
 	local alpha = 0
 	local animation_length = 120
 	if self.game_over_frames < animation_length then
@@ -981,12 +987,10 @@ function GameMode:drawSectionTimesWithSplits(current_section, section_limit)
 end
 
 function GameMode:drawBackground()
+	local id = self:getBackground()
+	if type(id) == "number" then id = clamp(id, 0, #backgrounds) end
 	love.graphics.setColor(1, 1, 1, 1)
-	love.graphics.draw(
-		backgrounds[self:getBackground()],
-		0, 0, 0,
-		0.5, 0.5
-	)
+	drawBackground(id)
 end
 
 function GameMode:drawFrame()
diff --git a/tetris/modes/marathon_2020.lua b/tetris/modes/marathon_2020.lua
index 7994ecf..54d1c3b 100644
--- a/tetris/modes/marathon_2020.lua
+++ b/tetris/modes/marathon_2020.lua
@@ -283,7 +283,7 @@ function Marathon2020Game:sectionPassed(old_level, new_level)
 		)
 	else
 		return (
-			(new_level < 2001 and math.floor(old_level / 100) < math.floor(new_level / 100)) or
+			(new_level < 2000 and math.floor(old_level / 100) < math.floor(new_level / 100)) or
 			(new_level >= 2020)
 		)
 	end
@@ -353,15 +353,10 @@ function Marathon2020Game:updateSectionTimes(old_level, new_level)
 		self.section_start_time = self.frames
 
 		if (
-			self.section_status[section - 1] == "cool" and
-			self.secondary_section_times[section] <= self.secondary_section_times[section - 1] + 120 and
-			self.secondary_section_times[section] < cool_cutoffs[self.delay_level]
+			(self.secondary_section_times[section] < cool_cutoffs[self.delay_level]) and
+		  	(section == 1 or self.secondary_section_times[section] <= self.secondary_section_times[section - 1] + 120)
 		) then
 			sectionCool(section)
-		elseif self.section_status[section - 1] == "cool" then
-			table.insert(self.section_status, "none")
-		elseif self.secondary_section_times[section] < cool_cutoffs[self.delay_level] then
-			sectionCool(section)
 		else
 			table.insert(self.section_status, "none")
 		end
diff --git a/tetris/modes/marathon_a2.lua b/tetris/modes/marathon_a2.lua
index 08fccd3..906c87f 100644
--- a/tetris/modes/marathon_a2.lua
+++ b/tetris/modes/marathon_a2.lua
@@ -249,10 +249,13 @@ local grade_conversion = {
 }
 
 function MarathonA2Game:whilePieceActive()
-	self.grade_point_decay_counter = self.grade_point_decay_counter + 1
-	if self.grade_point_decay_counter >= grade_point_decays[self.grade + 1] then
-		self.grade_point_decay_counter = 0
-		self.grade_points = math.max(0, self.grade_points - 1)
+	if self.clear then return
+	else
+		self.grade_point_decay_counter = self.grade_point_decay_counter + 1
+		if self.grade_point_decay_counter >= grade_point_decays[self.grade + 1] then
+			self.grade_point_decay_counter = 0
+			self.grade_points = math.max(0, self.grade_points - 1)
+		end
 	end
 end
 
diff --git a/tetris/modes/marathon_a3.lua b/tetris/modes/marathon_a3.lua
index 2c2890c..e40d373 100644
--- a/tetris/modes/marathon_a3.lua
+++ b/tetris/modes/marathon_a3.lua
@@ -26,7 +26,9 @@ function MarathonA3Game:new()
 	self.roll_points = 0
 	self.grade_point_decay_counter = 0
 	self.section_cool_grade = 0
-	self.section_status = { [0] = "none" }
+	--self.section_status = { [0] = "none" }
+	self.section_cools = { [0] = 0 }
+	self.section_regrets = { [0] = 0 }
 	self.section_start_time = 0
 	self.secondary_section_times = { [0] = 0 }
 	self.section_times = { [0] = 0 }
@@ -201,15 +203,23 @@ function MarathonA3Game:updateSectionTimes(old_level, new_level)
 		self.speed_level = self.section_cool and self.speed_level + 100 or self.speed_level
 
 		if section_time > regret_cutoffs[section] then
-			self.section_cool_grade = self.section_cool_grade - 1
-			table.insert(self.section_status, "regret")
+			if self.grade > 0 then
+				--this happens after the points are added, intentionally
+				local currentgrade = self:getAggregateGrade()
+				while self:getAggregateGrade() >= currentgrade do
+					self.grade = self.grade - 1
+				end
+				self.grade_points = 0
+			end
+			table.insert(self.section_regrets, 1)
 			self.coolregret_message = "REGRET!!"
 			self.coolregret_timer = 300
-		elseif self.section_cool then
-			self.section_cool_grade = self.section_cool_grade + 1
-			table.insert(self.section_status, "cool")
 		else
-			table.insert(self.section_status, "none")
+			table.insert(self.section_regrets, 0)
+		end
+		
+		if self.section_cool then
+			self.section_cool_grade = self.section_cool_grade + 1
 		end
 
 		self.section_cool = false
@@ -223,6 +233,9 @@ function MarathonA3Game:updateSectionTimes(old_level, new_level)
 			self.section_cool = true
 			self.coolregret_message = "COOL!!"
 			self.coolregret_timer = 300
+			table.insert(self.section_cools, 1)
+		else
+			table.insert(self.section_cools, 0)
 		end
 	end
 end
@@ -402,9 +415,11 @@ MarathonA3Game.mRollOpacityFunction = function(age)
 end
 
 function MarathonA3Game:sectionColourFunction(section)
-	if self.section_status[section] == "cool" then
+	if self.section_cools[section] == 1 and self.section_regrets[section] == 1 then
+		return { 1, 1, 0, 1 }
+	elseif self.section_cools[section] == 1 then
 		return { 0, 1, 0, 1 }
-	elseif self.section_status[section] == "regret" then
+	elseif self.section_regrets[section] == 1 then
 		return { 1, 0, 0, 1 }
 	else
 		return { 1, 1, 1, 1 }
diff --git a/tetris/modes/phantom_mania.lua b/tetris/modes/phantom_mania.lua
index 5bab937..75bf800 100644
--- a/tetris/modes/phantom_mania.lua
+++ b/tetris/modes/phantom_mania.lua
@@ -28,7 +28,6 @@ function PhantomManiaGame:new()
 	self.combo = 1
 	self.tetrises = 0
 	self.section_tetrises = {[0] = 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
-	self.section_req = true
 	self.randomizer = History6RollsRandomizer()
 end
 
@@ -55,7 +54,7 @@ function PhantomManiaGame:getDasLimit()
 end
 
 function PhantomManiaGame:getLineClearDelay()
-	return self:getLineARE()
+	return self:getLineARE() - 2
 end
 
 function PhantomManiaGame:getLockDelay()
@@ -120,11 +119,6 @@ function PhantomManiaGame:onLineClear(cleared_row_count)
 				self.level = 999
 			end
 			self.clear = true
-			for i = 0, 9 do
-				if self.section_tetrises[i] < (i == 9 and 1 or 2) then
-					self.section_req = false
-				end
-			end
 		else
 			self.level = new_level
 		end
@@ -175,6 +169,10 @@ local function getLetterGrade(level, clear)
 	end
 end
 
+function PhantomManiaGame:qualifiesForGM()
+    return true
+end
+
 function PhantomManiaGame:drawScoringInfo()
 	PhantomManiaGame.super.drawScoringInfo(self)
 
@@ -195,7 +193,7 @@ function PhantomManiaGame:drawScoringInfo()
 	if getLetterGrade(self.level, self.clear) ~= "" then
 		if self.roll_frames > 1982 then love.graphics.setColor(1, 0.5, 0, 1)
 		elseif self.level == 999 and self.clear then love.graphics.setColor(0, 1, 0, 1) end
-		if self.level == 999 and self.section_req and self.tetrises >= 31 then
+		if self.level == 999 and self:qualifiesForGM() then
 			love.graphics.printf("GM", text_x, 140, 90, "left")
 		else
 			love.graphics.printf(getLetterGrade(self.level, self.clear), text_x, 140, 90, "left")
diff --git a/tetris/modes/phantom_mania2.lua b/tetris/modes/phantom_mania2.lua
index 12ca98b..2f655f8 100644
--- a/tetris/modes/phantom_mania2.lua
+++ b/tetris/modes/phantom_mania2.lua
@@ -41,6 +41,7 @@ function PhantomMania2Game:new()
 
 	self.coolregret_message = ""
 	self.coolregret_timer = 0
+	self.coolregrets = { [0] = 0 }
 end
 
 function PhantomMania2Game:getARE()
@@ -202,13 +203,13 @@ end
 local cool_cutoffs = {
 	frameTime(0,36), frameTime(0,36), frameTime(0,36), frameTime(0,36), frameTime(0,36),
 	frameTime(0,30), frameTime(0,30), frameTime(0,30), frameTime(0,30), frameTime(0,30),
-	frameTime(0,27), frameTime(0,27), frameTime(0,27),
+	frameTime(0,30), frameTime(0,30), frameTime(0,30),
 }
 
 local regret_cutoffs = {
 	frameTime(0,50), frameTime(0,50), frameTime(0,50), frameTime(0,50), frameTime(0,50),
-	frameTime(0,40), frameTime(0,40), frameTime(0,40), frameTime(0,40), frameTime(0,40),
-	frameTime(0,35), frameTime(0,35), frameTime(0,35),
+	frameTime(0,42), frameTime(0,42), frameTime(0,42), frameTime(0,42), frameTime(0,42),
+	frameTime(0,42), frameTime(0,42), frameTime(0,42),
 }
 
 function PhantomMania2Game:updateSectionTimes(old_level, new_level)
@@ -219,11 +220,14 @@ function PhantomMania2Game:updateSectionTimes(old_level, new_level)
 		self.section_start_time = self.frames
 		if section_time <= cool_cutoffs[section] then
 			self.grade = self.grade + 2
+			table.insert(self.coolregrets, 2)
 			self.coolregret_message = "COOL!!"
 			self.coolregret_timer = 300
 		elseif section_time <= regret_cutoffs[section] then
 			self.grade = self.grade + 1
+			table.insert(self.coolregrets, 1)
 		else
+			table.insert(self.coolregrets, 0)
 			self.coolregret_message = "REGRET!!"
 			self.coolregret_timer = 300
 		end
@@ -292,6 +296,16 @@ function PhantomMania2Game:setHoldOpacity()
 	end
 end
 
+function PhantomMania2Game:sectionColourFunction(section)
+	if self.coolregrets[section] == 2 then
+		return { 0, 1, 0, 1 }
+	elseif self.coolregrets[section] == 0 then
+		return { 1, 0, 0, 1 }
+	else
+		return { 1, 1, 1, 1 }
+	end
+end
+
 function PhantomMania2Game:drawScoringInfo()
 	PhantomMania2Game.super.drawScoringInfo(self)
 
diff --git a/tetris/modes/phantom_mania_n.lua b/tetris/modes/phantom_mania_n.lua
index c063745..74b026a 100644
--- a/tetris/modes/phantom_mania_n.lua
+++ b/tetris/modes/phantom_mania_n.lua
@@ -13,4 +13,14 @@ function PhantomManiaNGame:new()
 	self.enable_hold = true
 end
 
+function PhantomManiaNGame:qualifiesForGM()
+    if self.tetrises < 31 then return false end
+    for i = 0, 9 do
+        if self.section_tetrises[i] < (i == 9 and 1 or 2) then
+            return false
+        end
+    end
+    return true
+end
+
 return PhantomManiaNGame
diff --git a/tetris/modes/survival_2020.lua b/tetris/modes/survival_2020.lua
index 76e7fa3..dd9f9d0 100644
--- a/tetris/modes/survival_2020.lua
+++ b/tetris/modes/survival_2020.lua
@@ -143,7 +143,7 @@ end
 function Survival2020Game:onPieceEnter()
 	if not self.clear and (
 		(self.level < 1900 and self.level % 100 ~= 99) or
-		self.level == 2019
+		(1900 <= self.level and self.level < 2019)
 	) then
 		self.level = self.level + 1
 	end
@@ -201,7 +201,7 @@ end
 
 Survival2020Game.opacityFunction = function(age)
 	if age > 300 then return 0
-	else return 1 - Math.max(age - 240, 0) / 60 end
+	else return 1 - math.max(age - 240, 0) / 60 end
 end
 
 function Survival2020Game:drawGrid()
@@ -249,7 +249,7 @@ function Survival2020Game:drawScoringInfo()
 end
 
 function Survival2020Game:getBackground()
-	return math.floor(self.level / 100)
+	return math.min(19, math.floor(self.level / 100))
 end
 
 function Survival2020Game:getHighscoreData()
diff --git a/tetris/rulesets/arika_exp.lua b/tetris/rulesets/arika_exp.lua
new file mode 100644
index 0000000..bd5aa6c
--- /dev/null
+++ b/tetris/rulesets/arika_exp.lua
@@ -0,0 +1,49 @@
+local Piece = require 'tetris.components.piece'
+local Ruleset = require 'tetris.rulesets.arika_ace2'
+
+local ARS = Ruleset:extend()
+
+ARS.name = "ARS-X"
+ARS.hash = "ArikaEXP"
+
+ARS.MANIPULATIONS_MAX = 24
+ARS.ROTATIONS_MAX = 12
+
+function ARS:onPieceCreate(piece, grid)
+	piece.manipulations = 0
+	piece.rotations = 0
+	piece.lowest_y = -math.huge
+end
+
+function ARS:checkNewLow(piece)
+	for _, block in pairs(piece:getBlockOffsets()) do
+		local y = piece.position.y + block.y
+		if y > piece.lowest_y then
+			piece.manipulations = 0
+			piece.rotations = 0
+			piece.lowest_y = y
+		end
+	end
+end
+
+function ARS:onPieceMove(piece, grid)
+	piece.lock_delay = 0 -- move reset
+	if piece:isDropBlocked(grid) then
+		piece.manipulations = piece.manipulations + 1
+		if piece.manipulations >= ARS.MANIPULATIONS_MAX then
+			piece.locked = true
+		end
+	end
+end
+
+function ARS:onPieceRotate(piece, grid, upward)
+	piece.lock_delay = 0 -- rotate reset
+	if upward or piece:isDropBlocked(grid) then
+        piece.rotations = piece.rotations + 1
+		if piece.rotations >= ARS.ROTATIONS_MAX and piece:isDropBlocked(grid) then
+			piece.locked = true
+		end
+	end
+end
+
+return ARS
\ No newline at end of file
diff --git a/tetris/rulesets/standard.lua b/tetris/rulesets/standard.lua
index 79226d7..0013277 100644
--- a/tetris/rulesets/standard.lua
+++ b/tetris/rulesets/standard.lua
@@ -1,5 +1,5 @@
 local Piece = require 'tetris.components.piece'
-local Ruleset = require 'tetris.rulesets.standard_exp'
+local Ruleset = require 'tetris.rulesets.standard_ace'
 
 local SRS = Ruleset:extend()
 
@@ -8,6 +8,8 @@ SRS.hash = "Standard"
 SRS.softdrop_lock = false
 SRS.harddrop_lock = true
 
+SRS.enable_IRS_wallkicks = true
+
 SRS.MANIPULATIONS_MAX = 15
 
 SRS.wallkicks_line = {
@@ -33,8 +35,8 @@ SRS.wallkicks_line = {
 	},
 };
 
-function SRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
 
+function SRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
 	local kicks
 	if piece.shape == "O" then
 		return
@@ -69,6 +71,12 @@ function SRS:checkNewLow(piece)
 	end
 end
 
+function SRS:onPieceCreate(piece, grid)
+	piece.manipulations = 0
+	piece.rotations = 0
+	piece.lowest_y = -math.huge
+end
+
 function SRS:onPieceDrop(piece, grid)
 	self:checkNewLow(piece)
 	if piece.manipulations >= self.MANIPULATIONS_MAX and piece:isDropBlocked(grid) then
@@ -85,6 +93,8 @@ function SRS:onPieceMove(piece, grid)
 		if piece.manipulations >= SRS.MANIPULATIONS_MAX then
 			piece.locked = true
 		end
+	else
+		piece.locked = false
 	end
 end
 
@@ -102,4 +112,6 @@ end
 
 function SRS:canPieceRotate() return true end
 
+function SRS:get180RotationValue() return 2 end
+
 return SRS
diff --git a/tetris/rulesets/arika_srs.lua b/tetris/rulesets/standard_ace.lua
old mode 100755
new mode 100644
similarity index 93%
rename from tetris/rulesets/arika_srs.lua
rename to tetris/rulesets/standard_ace.lua
index 784c23d..15a68f6
--- a/tetris/rulesets/arika_srs.lua
+++ b/tetris/rulesets/standard_ace.lua
@@ -1,5 +1,5 @@
 local Piece = require 'tetris.components.piece'
-local Ruleset = require 'tetris.rulesets.ti_srs'
+local Ruleset = require 'tetris.rulesets.standard_ti'
 
 local SRS = Ruleset:extend()
 
diff --git a/tetris/rulesets/standard_exp.lua b/tetris/rulesets/standard_exp.lua
index b36192a..354f90d 100755
--- a/tetris/rulesets/standard_exp.lua
+++ b/tetris/rulesets/standard_exp.lua
@@ -1,5 +1,5 @@
 local Piece = require 'tetris.components.piece'
-local Ruleset = require 'tetris.rulesets.arika_srs'
+local Ruleset = require 'tetris.rulesets.standard_ti'
 
 local SRS = Ruleset:extend()
 
@@ -27,8 +27,6 @@ function SRS:checkNewLow(piece)
 	for _, block in pairs(piece:getBlockOffsets()) do
 		local y = piece.position.y + block.y
 		if y > piece.lowest_y then
-			--piece.manipulations = 0
-			--piece.rotations = 0
 			piece.lowest_y = y
 		end
 	end
diff --git a/tetris/rulesets/ti_srs.lua b/tetris/rulesets/standard_ti.lua
similarity index 100%
rename from tetris/rulesets/ti_srs.lua
rename to tetris/rulesets/standard_ti.lua