Two tanks move around, using infrared light sensors to avoid objects, and trying to shoot each other down. Unfortunately, the bullets can only travel 50 metres, so they have a built in radar to detect if the other tank is within shooting range. The tank gets damaged if it runs into a bullet, the base of a bush, or the walls of the arena. If a tank gets too damaged, it breaks down and the other tank wins. But you can repair it and try another battle by clicking the green flag twice.