I need some help with a game that has the same idea as Audiosurf!

[Tunadin]

I don't have any code mainly because I don't know where to start. I have to make a game for a class and I could do something simple like a text based game but that isn't me. My idea is to have something like audiosurf where you're either a ninja dodging throwing stars or a spaceship with asteroids. You'd operate it with the left and right keys and you could go to one of three spaces at the bottom. Something like this http://guide2games.org/wp-content/uploads/2008/02/audiosurf3.jpg could you guys help me get started?

[Raknarg]

First set up a playing field with three tracks. Either get a picture of a ninja or use a temporary replacement circle or something. See if you can get the ninja to move along the tracks when you press a key.

I hope you aren't planning to make it analyze a song to make a track.