[Coda]

Salone understands WHY gravity-reverse is on the same button as jump, but maybe it COULD have a toggle option. That would probably satisfy everyone. An options screen might be good for configuring touchscreen controls too. I could probably stand to improve the instructions rather than just a little table -- some play tips would be invaluable since I seem to have to explain the same things to everyone who plays.

Re: friend #1: Starting standing still wouldn't work very well. Either you'd take off like a bullet the moment you touch a button, or you'd be moving too slowly to make a meaningful jump at the beginning. And while putting the player farther to the right would look nicer, it would be way harder to play because you'd have less time to react to stuff. (I actually DID have it farther right early on in development.)

Sound effects are an interesting idea. I'll think about it.