My fellow Plaidnotion-ist (Evan) and I have posted up our Global Game Jam Game, entitled: Battery Boats.
http://plaidnotion.com/batteryboats/
The object of the game is to smash your opponent into a rock. However, you are tied together with a buoy that will kill both of you if it collides with an obstacle.
use arrow keys and WASD to move, The ctrl buttons for boosts for each boat respectively.
Go give it a whirl!
2 People required for maximum funnity.
