Just finished the update levels! Holy cow! The levels are HUGE! The final boss fight was so cool too!!! Dude!!!
You have a file select with 3 saves as well as a new story to play that involves both Kiwi and MacBat. I'm not gonna spoil it, but it's really epic! It's like 3 extra worlds to explore and there's a new final boss fight. :D Good stuff! No DLC to download or anything, just download the 2.0 version of the game. It has all the content in it.