Really cool experience! The Deer feels quite scary and ominous, and it creates this constant tension that makes even simple actions like looking for objects feel urgent and anxious. Great concept!
The deer itself is really well done and ominous, though I wasn’t totally sure when or if it could open doors. Sometimes it did, sometimes it didn’t. If that was intentional, it was quite funny since I kept trying to trap it inside rooms to buy a few more seconds to solve the puzzles. Without this trick i don't know if I would have managed to solve all of them. I also found a small bug where I could access the bedroom with the screwdriver puzzle even without having the screwdriver (the door was open with the screwdriver thing floating in space). Not sure how it happened, but thought I’d mention it.
I also liked the overall aesthetics, and the ending in particular was cool, good job! :)