Multiplayer bumperkartish game using a single host screen where players can join by scanning a QR code and use there phones as controllers. Using box2dweb.js, zappa, nodejs, express, socket.io, coffeescript, redis, kickass graphics.
You can already pause the background music with the 'm' key.
I guess it would be good to be able to turn off the sound effects as well with the 's' key or sth.