I really enjoyed this experience, short and sweet! The entity present here and the more poetic lines about the way it looks, the way it behaves, its reason for getting involved with our doctor was very cool. My favorite part was the body on the table slowly changing, looked great!
A bug happened that crashed my game when I entered the wall and moved forward, clicking the puzzle and solving it before the shadow had fully settled into place on the left side. Seemed like the game didn't know what to do as the animation hadn't finished yet. I was able to get it to happen a couple times going through that sequence before the shadow settled, so fingers crossed it's easy to fix.