Each player is represented by a mouse-shaped game piece which travels along a non-continuous, roughly square-shaped path around the game board from the start to a continuous loop at the end. The path is segmented into spaces, some of which are marked with instructions, and "build" spaces that are marked simply with numbers ("2", "2-3" and "2-3-4")
The object of the game is to trap all of one's opponent's mice using the game's Rube Goldberg-style mouse trap, which is built upon the board during the course of the game. The trap begins with a crank which turns a set of gears. This begins a series of stages which ends in a cage being lowered over the "cheese wheel" space on the board, which is one of six spaces in the ending loop of the game path.
