Fixed a slight indentation error

fix lategame levelling bug

main.lua

@@ -114,7 +114,7 @@ function love.keypressed(key, scancode)
 		scene.restart_message = true
 		if config.secret then playSE("mode_decide")
 		else playSE("erase") end
-		-- f12 is reserved for saving screenshots
+	-- 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")

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

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
@@ -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()