Every time you collect any material, a timer resets. If you fail to capture any more material before the timer runs out, your tail will also shrink. You can lose a life if you completely decay, or if you run into the maze walls, your own or your opponent's tail. Play continues until you achieve a certain score, at which point an exit opens up in the outer wall, which will take you to the next arena. There are five speed settings and a total of 50 levels with increasingly complicated wall patterns, making it much more difficult to navigate safely.