itch.io

pebcak

buy it on GOG

redownload your game. if you continue to struggle, wipe your save and watch somebody else's gameplay;

x64: https://support.apple.com/en-us/102622

M1: https://www.parallels.com/products/desktop/

you don't really need a good pc to run this game; can you run portal? the average school chromebook can run this game, and they struggle with flash games

also, basically any computer that you can install steam on can pick up a first party controller and let you control this game with it, but the controller controls are a steam mapping to KB+M and the default mapping isnt perfect imo