Alarm in Monstercity - the slime monsters are on the loose. This cheeky gang is having a blast slapping the city monsters with their sticky slime hands. All the city monsters and slime monsters are mixed up and spread out on the table, while the game pieces sit on the edge of the box ready to score points. As soon as the spinner indicates which monster should be slapped, all players simultaneously try to quickly catch it with their stretchy, sticky slime hand. Things get very chaotic, and sometimes a duel occurs where several slime hands tussle over a card. Whoever ends up with the spun monster stuck to their hand can move their piece forward on the slime splat. The player who completes a lap around the scoring track wins the wild monster chase.