A platform/run 'n jump game where Mappy' the mouse is to retrieve all of the stolen treasure from the Meowky cat gang. They've stashed all of the loot in their leader's mansion which contains several floors, and numerous trampolines that the Meowkies like to use to travel between stories. Mappy must keep away from the cats and collect all items in the house before moving on to the next house. If Mappy is caught by a cat, he loses a life. Mappy also loses a life if he crashes to the floor by breaking through a trampoline or falling into a pitfall. When all of Mappy's lives are lost, the game is over.
Note: Used Invincibility cheat after down to last life. The game is endless.