Mario Bros MX is based on the original Mario Bros. arcade game played with 2 players. Players control Mario and Luigi simultaneously. Flip the creatures over by hitting a block underneath the enemy or hitting the 'POW' block. Kick the enemy before it turns right side up to earn a coin. Collect 4 coins to win the round. The player controlling Mario uses the left and right arrow keys to move and the ';' key to jump. Move Luigi with the'V' and 'B' keys and make him jump with the 'S' key.