Mario Mario and Luigi Mario the Mario Brothers must try to get rid of Shellcreepers turtles, Sidesteppers crabs need to be hit twice, and Fighterflies fliescan only be defeated while they touch the platform who come pouring out of the waterworks.Hit the floor beneath them to flip them over, then kick them into the water. Collect coins for bonus.

The first player controls Mario blue and the second player controls Luigi green. You can either work together to kill all the opponents, or compete by putting the other player in a position to be killed.

Unlike later Mario games, players cannot jump on enemies and squash them, unless they were already turned on their back. Each phase is a series of platforms with pipes at each corner of the screen, along with an object called a "POW" block in the center. Phases use wraparound, meaning that enemies and players that go off to one side will reappear on the opposite side.