You are controlling a group of objects and trying to get them all to the finish line. These objects can be blocks or balls. Try to not lose any of your blocks or balls along the way. Collect all the green or yellow balls on your journey. These will give you more experience and will earn you more stars at the end of each level. Also, the more blocks you lose the less points and stars you get at the end of level. You use your "A" and "D" keys to move the screen and in turn the blocks or balls.