diff --git a/tetris/modes/big_a2.lua b/tetris/modes/big_a2.lua
index de77815..73d8034 100755
--- a/tetris/modes/big_a2.lua
+++ b/tetris/modes/big_a2.lua
@@ -1,3 +1,4 @@
+local GameMode = require 'tetris.modes.gamemode'
 local MarathonA2Game = require 'tetris.modes.marathon_a2'
 
 local BigA2Game = MarathonA2Game:extend()
@@ -7,16 +8,43 @@ BigA2Game.hash = "BigA2"
 BigA2Game.tagline = "Big blocks in the most celebrated TGM mode!"
 
 function BigA2Game:new()
-	MarathonA2Game:new()
+	BigA2Game.super:new()
 	self.big_mode = true
 end
 
-function BigA2Game:onLineClear(cleared_row_count)
-	return MarathonA2Game:onLineClear(cleared_row_count / 2)
+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:updateScore(level, drop_bonus, cleared_lines)
-	return MarathonA2Game:updateScore(level, drop_bonus, cleared_lines / 2)
+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
+	end
+	self.lock_drop = self.level >= 900
+	self.lock_hard_drop = self.level >= 900
 end
 
 return BigA2Game
\ No newline at end of file