My, uhh, simple (compared to others) physics engine. W, A, D or arrow keys to move, and spacebar alternates between ground material. Remix if you want to use it. There are instructions on how to customize it inside the project. Also, if you use it, please credit me.
Please comment any issues! I will try to fix the issues. Tip: If you are seperating the head and body into different sprites, make the body sprite broadcast a message every tick and the head sprite go to the body sprite when it recieves that message. That should fix the "go to:" block delay. Also, the guy breathing in space isn't an issue. (Just to get that out of the way)