THIS PROJECT IS NOT IMPOSSIBLE I'VE TESTED THE ENTIRE THING (it took me 10 minutes lol) WARNING: This platformer may cause the player to slam their computer shut or even toss it out of the window, it is completely normal to do that. Now on with the instructions... Arrow keys or WASD, like any other normal platformer. you can also duck and walljump.
player code by tutorial by @griffpatch, everything else by me