Liked the key puzzle, I think there's a lot of potential in this but I just couldn't figure out what I was supposed to do once I left the first room. Then I dropped the spanner and it fell through the floor so had to give up.
The T-posing model (and its shadow) got in the way, think that could've been left out, but I liked the mirror transition, that was really nicely done.
It's a really original idea too, well done for doing something a bit different!