For the 2015 Global Game Jam we created a Massively Multiplayer Local One Button game (MMLOB)™. Players can join the game by holding down almost any button on a keyboard, mouse or controller. Once joined, players take the role of a character in a side scrolling infinite runner. Using your set key, players can jump out of the way of obstacles, using power-ups to aid their escape from the looming left-hand side of the screen.
Here is a link to more information on the post-GGJ development of SMCD: