diff --git a/resources/ping-pong-mips32/game/game/game.S b/resources/ping-pong-mips32/game/game/game.S
index 9696b79..2540c04 100644
--- a/resources/ping-pong-mips32/game/game/game.S
+++ b/resources/ping-pong-mips32/game/game/game.S
@@ -181,7 +181,7 @@ kb_readbuffer:
 11:
     bnez t0, 12f
     addi t1, ball_x, -player2_x
-    sub t2, ball_x, player1_y
+    sub t2, ball_y, player1_y
     bltz t2, GAME_START
     addi t2, t2, -2
     bgez t2, GAME_START
@@ -190,7 +190,7 @@ kb_readbuffer:
     sll t1, random, 13
 12:
     bnez t1, GAME_START
-    sub t3, ball_x, player2_y
+    sub t3, ball_y, player2_y
     bltz t3, GAME_START
     addi t3, t3, -2
     bgez t3, GAME_START