Gridrunner Versions Save

Gridrunner on the C64 is deliberately slow. With the following simple patch we can tune it to be twice as fast, and to my taste, even more enjoyable to play.

diff --git a/src/c64/gridrunner.asm b/src/c64/gridrunner.asm
index ec22f51..f91d146 100644
--- a/src/c64/gridrunner.asm
+++ b/src/c64/gridrunner.asm
@@ -924,7 +924,7 @@ DrawBullet
         BEQ b84FD
 b84FC   RTS 
 
-b84FD   LDA #$18
+b84FD   LDA #$08
         STA bulletAndLaserFrameRate
         JSR MaybePlayBulletSound
         LDA currentBulletYPosition
@@ -1494,7 +1494,7 @@ DrawDroids
         BEQ b88CE
 b88CD   RTS 
 
-b88CE   LDA #$80
+b88CE   LDA #$40
         STA droidFrameRate
         JSR UpdateDroidsRemaining
         LDA noOfDroidSquadsCurrentLevel

To see it in action go to: https://www.youtube.com/watch?v=1a3ogaWaxMM