Space bar to jump. Down arrow to duck. Up arrow is fly (in the flappy bird section). I have not completed this yet so it won't be as good as my final version. Mobile: Tap anywhere is jump. Buttons at the top are to jump and to fly (they'll interchange at the right times). Sorry that they'll get in the way of the anti-gravity bit. I'll change that soon.
Music (official geometry dash music) coming soon BTW the game will only say your name on your game (privacy reasons), but will save the highest score.