Boat Boat is a local multiplayer game in which the 2-4 players have to cooperate by performing multiple simultaneous tasks in order to guide a ship to treasure and avoid being sunk by enemy AI pirates. The players have a choice of three tasks they can rotate among: rowing, spotting, or manning the cannons.
Having been the lead developer of this game, one of the features I'm proud of is the novel control scheme. For instance, when a player is manning the oars, each analog stick directly controls one of the corresponding oars. Inward rotation propels you forward, outward rotation propels you backward.
Having begun as a perlin noise mesh generation and physics simulation, in one semester Boat Boat became a game about the hilarious frustrations of (in)efficient team communication.