The concept behind Buster Boy is that you have to pop a bunch of balloons (Balls? Bubbles? Whatever) as they bounce around you. You do this by hitting them with some strange wire thing or by shooting balls at them. You have to avoid being hit by the bouncing balls because they'll diminish your health. Oh, and when you pop a bubble it becomes more, smaller bubbles that you need to destroy. Once you get rid of everything the level is over and it starts up anew, with more balls.