Hold Space to Launch, B to Spindash, and V in Modern Mode in the air to do the Homing Attack. Be wise, as the Homing Attack can only be done 5 times. This is basically part game, part tech demo for my if on edge, turn around block, which turned out to be really useful for this project!
Sonic Spinball for inspiration, and Spriters Resource for all but three of the sprites. Added a Border option toggled by pressing the flag and 3 at the same time. 11/23/24: Fixed most (if not all)bugs