Super Mario 64 is a 1996 platform game for the Nintendo 64 and the first Super Mario game to feature 3D gameplay. It was developed by Nintendo EAD and published by Nintendo. 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.