Arrow keys to move and jump. The green stars increase your score, and the red stars, should they be missed, cause you to lose a life. Rainbow powerup boosts speed/jump height, stop sign kills all reds on screen, yellow arrow slows stars, and black/blue arrow lets you warp from one side of the screen to the other.
Music is Megadrive Jam by EliteFerrex: http://eliteferrex.newgrounds.com/
My best game, I think. Might update it with more powerups in future.