Mario Bros. is a 1983 platform game developed and published for arcades by Nintendo. It was designed by Shigeru Miyamoto and Gunpei Yokoi, Nintendo's chief engineer. Italian plumber Mario and his twin brother Luigi exterminate creatures emerging from the sewers by knocking them upside-down and kicking them away. You can save your data to your browser. Click the settings icon and press "Save State Location", then change it to "Keep in Browser". You can enter fullscreen by hovering over the game and pressing the fullscreen button in the bottom right If pressing enter causes the game to tab in and out, just click on the middle of the game to refocus.