Avoid the walls. Aim with the mouse, click once to shoot grappling hook, and press again to reset/remove the hook. Hook onto balls to gain momentum and maneuvre around the playing field by springing from ball to ball. You are awarded points by activating all balls on the field as quickly as possible (the faster, the more points will be awarded). Lives are lost by hitting the boundary walls or being sucked into a black hole. Have a blast when you Bounce!