Nice visuals and overall atmosphere!
As for the puzzle, that was hard, honestly I could not complete it and stop playing after wandering around and trying my best for 10 minutes, but probably it’s just me.
Some critique:
- Full screen button would help a lot, the web page around the game window is distracting.
- Mirrors rotation is a bit tricky, hard to describe why but basically you have to adjust player position along with mirror rotation. Probably binding the camera to the mirror would help.
- Some objects including mirror columns lack colliders, first it feels bad, second it complicated mirror positioning even more.
Overall - a solid entry for a game jam, congratulations!