Congrats on finishing the game! I really like the idea of solving puzzles while trying to escape.
I think a little more guidance would help a lot. Some small button prompts when an interaction is available would be useful, since I forgot the interact key halfway through and couldn't go back to the main menu to check the controls.
I also clipped through the walls/floors quite a few times, so giving them a little more thickness and checking the collision might help!
Also, the bald guy in white suddenly banging on the door actually scared me XD
With some more polishing, I think this could turn into something really fun!