The game is based on a (Hungarian) animated movie from the 80s. The english title for the movie was Cat City. Grabowski the mouse plays against the rats Pissy, Buddy, Cookie and Billy and the cat Teufel. The aim of the game is to be the first to complete a puzzle. Grabowski gets a piece of his puzzle for arriving at the lab, the rats/cat get a piece of theirs if they manage to trap Grabowski.