WEBPLAYER DEMO: Noblewhale.com
Boss added - In single player menu you can select the boss fight. If you are new to the game I would recommend playing through all of the previous levels first.
Cooperative mode added - Can be played with two controllers on the same computer. In Multiplayer, host a game and select race and then select the Cooperative map. It requires some intermediate Grabbling.
Same screen multiplayer added - We will spawn a Grabble for every controller hooked up to your computer. Play with those assholes you call roommates.
Feedback on the above changes would be much appreciated. There are tons of other tiny changes but those are the major things.