Pretty good little coop game. Lots of little puzzles that will take teamwork for everyone playing with you. And some Gauntlet style shooting/fighting in between.
We had a couple glitches last night but overall I've enjoyed the change of pace.
Every once in a while the wife will get the itch to play a video game with me. We downloaded this one and got addicted pretty quick. It's not something I would pay money for, but for a free game it's not bad.