In X-Bound, you have to stop the ball from falling down the central drain in the screen. On the screen, you'll see a large gray circle, with the drain in the middle and the ball on the side. When the game starts, the ball will come flying at you. You control the small purple platform right next to the drain. You have to use your left and right arrow keys on your keyboard to swivel the platform around the drain. Bounce the ball away from and collect different items. They will either make the platform larger or smaller, or make the ball move faster or slower.