I got stuck in the demo of Fez, and I wasn't sure if that was because it was a demo, or I missed something. In any case I wandered all over the place trying to find the remaining cube pieces and could never find them. That got kind of old so I didn't buy it.
I also tried The Walking Dead. That seems good and I'll buy it at some point, but I also tried Spelunky and that's the one I bought. Awesome, but very difficulty game. Difficult but addicting.