Players must guide Micro Police mouse Mappy through eight levels gathering items for Mapico’s birthday while avoiding the evil cat boss Goro and his gang of Mewkies. Completing these multi-tiered, side-scrolling levels will cause them to loop and offer players a greater challenge. In each thematically varied level, Mappy must collect all of a given item, such as cheese in the first loop, to open the exit to the next.