Champo has to run and catch the mice, one by one, and place them into a cage at the back of the warehouse. After surprising and catching the mouse, he has to come back to the cage and aim carefully in order to make the mouse land into the cage. There's a time limit of 99 seconds, which is constant for all options. If Champo hits a wall or any other obstacle in the warehouse, he falls down and loses some time coming to his senses. While running and catching, Champo has to keep an eye on the cage, for the still-free mice will come and try to destroy the cage to release their comrades. In addition, when the number of mice in the cage increases, they will also try to break the cage from the inside. The only way for Champo to make them stop is to come back near the cage, and thus frighten them.