Neat concept. Could definitely use some QOF improvements.
As another commenter mentioned, an explanation of the shapeshifting mechanic would have been super useful. What can I do in shapeshifting form? Are there the same limitations? Why can a rat pull a level but not search a bookshelf?
Explaining that the light area around the piano is sun and not several candles, which is what they look like, would be useful as well.
Lastly, for the love of God, the movement speed is abysmal. I got the ability to push statues and then died in the sun that I could not tell that I was standing in and I simply don't want to go back and slowly walk around the area again to get to where I was. I understand that he is injured at the beginning, but if he can push large stone pillars around he can walk at faster than a snails pace.
Great art and dialogue, but the movement speed and lack of checkpoints really brings the game down.