Honestly this is a great idea for a feature with prizes. That said I do hope we get to see Dan and Jeff (once he returns) making levels together again.
I'm sure some folks will have fun with this, but boy I think this looks kinda bad. The world itself seems lifeless and boring, plus it looks rough in spots. Heard some negative thoughts from friends who played the beta but seeing it in action certainly turned me off.
MachoFantastico's comments