diff --git a/art/animations.asm b/art/animations.asm
index bc1b5c7..5a02205 100644
--- a/art/animations.asm
+++ b/art/animations.asm
@@ -97,31 +97,31 @@
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p2 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p3 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p4 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p5 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph1p1 animation_addr
     mva #1 LumberjackDir    ; right side
     rts
@@ -133,31 +133,31 @@ AnimationR2 = AnimationR1
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p2 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p3 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p4 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p5 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph1p1 animation_addr
     mva #2 LumberjackDir    ; left side
     rts
@@ -169,31 +169,31 @@ AnimationL2 = AnimationL1
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p2 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p3 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p4 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p5 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph1p1 animation_addr
     mva #1 LumberjackDir    ; right side
     rts
@@ -204,31 +204,31 @@ AnimationL2 = AnimationL1
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p2 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p3 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p4 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p5 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph1p1 animation_addr
     mva #2 LumberjackDir    ; left side
     rts
@@ -239,28 +239,28 @@ AnimationL2 = AnimationL1
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p11 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p12 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p13 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p14 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph1p1 animation_addr
     mva #1 LumberjackDir    ; right side (kill)
@@ -273,28 +273,28 @@ AnimationR5 = AnimationR4
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p11 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p12 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p13 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p14 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph1p1 animation_addr
     mva #2 LumberjackDir    ; left side (kill)
@@ -307,28 +307,28 @@ AnimationL5 = AnimationL4
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p11 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p12 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p13 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p14 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph1p1 animation_addr
     mva #1 LumberjackDir    ; right side (kill)
@@ -340,28 +340,28 @@ AnimationL5 = AnimationL4
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p11 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p12 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p13 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p14 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph1p1 animation_addr
     mva #2 LumberjackDir    ; left side (kill)
@@ -373,31 +373,31 @@ AnimationL5 = AnimationL4
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p7 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p8 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p9 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p10 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph1p2 animation_addr
     mva #1 LumberjackDir    ; right side
     rts
@@ -409,31 +409,31 @@ AnimationR8 = AnimationR7
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p1 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p2 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p3 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p4 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p1 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p7 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p8 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p9 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p10 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph1p2 animation_addr
     mva #2 LumberjackDir    ; left side
     rts
@@ -445,31 +445,31 @@ AnimationL8 = AnimationL7
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
     mwa #gamescreen_r_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p7 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p8 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p9 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph3p10 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_r_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph1p2 animation_addr
     mva #1 LumberjackDir    ; right side
     rts
@@ -480,31 +480,31 @@ AnimationL8 = AnimationL7
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
     mwa #gamescreen_l_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p6 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p7 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph2p8 animation_addr
     jsr RestoreRedBar
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph3p6 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p7 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p8 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p9 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph3p10 animation_addr
-    waitRTC
+    WaitForSync
     jsr branches_go_down
     mwa #gamescreen_l_ph2p5 animation_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph1p2 animation_addr
     mva #2 LumberjackDir    ; left side
     rts
diff --git a/lumber.asm b/lumber.asm
index 0dc665c..909f24b 100644
--- a/lumber.asm
+++ b/lumber.asm
@@ -9,7 +9,7 @@
 
 ;---------------------------------------------------
 .macro build
-    dta d"0.00" ; number of this build (4 bytes)
+    dta d"0.01" ; number of this build (4 bytes)
 .endm
 
 .macro RMTSong
@@ -25,6 +25,7 @@ display = $a000
     .zpvar temp .word = $80
     .zpvar temp2 .word
     .zpvar tempbyte .byte
+    .zpvar SyncByte .byte
     .zpvar StateFlag .byte    ; 0 - game, 1 - start screen, 2 game over screen, etc.
     .zpvar PowerValue .byte ; power: 0 - 48
     .zpvar PowerTimer .byte
@@ -172,6 +173,7 @@ DLI2
     nop
     nop
     mva #$c6 COLBAK
+    inc SyncByte
     pla
     rti
 DLI3
@@ -314,7 +316,7 @@ right_pressed
     ; death by lower right branch
     mva #>font_game_lower_right LowCharsetBase
     mwa #last_line_r lastline_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_r_ph1p1 animation_addr
     mva #1 LumberjackDir    ; right side
     bne LevelDeath
@@ -367,7 +369,7 @@ left_pressed
     ; death by lower left branch
     mva #>font_game_lower_left LowCharsetBase
     mwa #last_line_l lastline_addr
-    waitRTC
+    WaitForSync
     mwa #gamescreen_l_ph1p1 animation_addr
     mva #2 LumberjackDir    ; left side
     bne LevelDeath
@@ -1000,6 +1002,15 @@ KeyReleased
     rts
 .endp
 ;--------------------------------------------------
+.proc WaitForSync
+;--------------------------------------------------
+    lda SyncByte
+@   cmp SyncByte
+    beq @-
+    rts
+.endp
+;--------------------------------------------------
+
 initial_branches_list
     .by 1,0,2,0,1,0 ; 
 
diff --git a/lumber.xex b/lumber.xex
index 6622f75..4753907 100644
Binary files a/lumber.xex and b/lumber.xex differ