Mario Bros

Mario is investigating the sewers of New York after strange creatures have been appearing down there.

The goal of the game is to defeat all of the enemies in each phase. The mechanics of Mario Bros. involve only running and jumping. Unlike future Mario games, players cannot jump on enemies while they are invulnerable to attack. Each phase is a series of platforms with four pipes at each corner of the screen, and an object called a "POW" block in the center.

Both sides of every phase feature a mechanism that allows the player to go off-screen to the left and appear on the right and vice versa.

The player gains points by defeating multiple enemies consecutively and can participate in a bonus round to gain more points. Enemies are defeated by running up to them and kicking them when they are flipped on their back. Players cause enemies to flip by hitting them from below the platform they are on or by hitting the POW block to overturn all enemies on the ground.

If the player allows the enemy to get up, the enemy becomes angry and increases in speed. Each phase has a certain number of enemies, ended with a more powerful enemy. Enemies come in variants-for example, Sidesteppers, a type of crab, are usually red, but turn blue and become faster when they recover from being flipped or if they are the final enemy.

Each enemy has its own mechanics: the Shellcreeper, a type of turtle closely related to Koopa Troopas, can be made vulnerable by hitting it from below once; the Fighter Fly, a type of fly, jumps into the air every once in a while and must be hit from below when it is not in the air; and the Sidesteppers must be hit twice from below to become vulnerable.

Another enemy, called a Slipice, has the ability to melt down and freeze the platform it is on, making it more difficult for the player to control the characters.

Keys : L/R arrow keys to move and space to jump