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.
By the way, 5 is the easiest in my opinion and 1 is the trickiest.
