Hi chunk...
I bought The Cave. I think it's great. My only complaint is that the replay value isn't quite there. The game is generally a series of fetch quests which is fine the first time through. Unfortunately the next go around's pretty much the same level design, so I didn't feel compelled to get to each character's specific level the next time through. I may go back to it.
The game is pretty silly/funny and definitely gets you thinking. Overall I give it around a 7.5-8.