On the surface, Poom seems like a fairly easy game. You drop a ball and have to keep it bouncing on a 3D platform. The trick is that the platform keeps changing. You don't control the ball, but the platofmr itself and its up to you to quickly spot the changes and position the platform so that the ball hits a tile and doesn't fall through a hole instead. As you keep the ball bouncing, you'll see different types of tiles appear. Some will make the ball bounce better than others, some offer up little treasure bonuses for you to collect. Like bouncing a tennis ball on the end of a racket, the idea is to see how long you can keep the ball in play.