Mario Kart 64 is a 1996 kart racing video game developed and published by Nintendo for the Nintendo 64. The game is the second entry in the Mario Kart series and is the successor to Super Mario Kart for the Super Nintendo Entertainment System. 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.