Agon_Critters

Agon Light sprite demo/example in C.

Also shows:

• Using waitvblank() to sync sprite updates to video refresh (VBLANK)
• getkeycode() function to read keypresses

Initially based off the Agon sokoban C source code. waitvblank() fixed/updated (mos-interface.asm). getkeycode() function added (mos-interface.asm).