I love the concept for the puzzles-- i wish there were more and harder ones too, but I understand the time constraints limiting that.
This is probably the game i've played with the most investing story. a mechanical/streampunk engine that is dubiously alive and requires human sacrifice to live? sign me up (actually don't. I dont want to become machine food XD)
Usually when I boot up a game and see the Unreal Engine logo I prepare for my computer to go nuclear but shockingly, once I put the graphics on the lowest setting, it didn't blow up! props to the optimization. There was noticeable lag when I was in the ball spirit form, but it wasn't enough to effect my enjoyment of the game in general.