Arrow keys to move left and right, space bar to jump. You WILL NEED A MICROPHONE to play this game, and you will need to give Scratch access to this game for it to work. You will need to play a song on youtube or your ipod or something in the background. Any song will work, but try one with a steady, loud beat. Cognitive Dissonance by Wolfgang Gartner is a good song, as well are most of the electronic music genre (Think Swedish House Mafia, or Deadmau5). I think Dubstep would be awesome, but I haven't tried it.
I used a jumping script from a project called Josh's Summer PRoject because I didn't know how to make gravity jumping. http://scratch.mit.edu/projects/12125250/ A fun song to play on is Greyhound by Swedish House Mafia. If a song isn't working for you, try adjusting the volume so that hills appear. Tell me what your favourite song to jump on is!