Perpetuum mobile for Pocket PC is a video animation that can also be used as a screensaver. It's interactive and also 3D. Perpetuum mobile for Pocket PC also includes a game where the goal is to have as many balls in the room as possible. The high score is shown top left in the game window. The viewing field, for the game, screensaver and video animation, is an open room to which you are looking in through a game window. Perpetuum mobile for Pocket PC allows you to alter the game window in size, and this will also make the room change in depth. You can choose to control the movements of the balls in the room or have it set to random. You start the game or the animation by selecting "Start" in the pop-up Window, you pause by clicking on Pause or the F2 button. Enjoy this as a game or a screensaver in your pocket PC!