I make my games in GameMaker, I want to make web builds but i don't think GameMaker supports it. Also, because you really played my game, i'll give you a secret code. Right click the start button exactly 100 times. It allows access to a hard mode.
GameMaker does support web builds, you have to click the cross-air in the top right of the screen, select HTML5, then build the game as a zip file.
Your code's probably not as bad as mine but I had to resize the game window to make the game playable.
Useful link: https://itch.io/docs/creators/html5
2 days ago (+1)
It's easier than that the default GX.games build target works just fine on itch, export that as a zip, upload it as a web project, enable fullscreen and your good to go
1 day ago (+1)
HTML 5 is buggy I've had issues in the past with post processing bugging out but building it as a gx.games target, outputting as a zip and uploading it set as a play in browser game works just fine