Hey there, I really enjoyed the game! I wasn't sure what to expect going in but I was quite surprised with how well done it was.
The atmosphere was excellent, the changing hallways, doors, and rooms along with the sounds and noises kept me on edge, and they helped to build up to the scares nicely. It has an eerie feeling to it, and the tape recordings are a great way of conveying a story around what happened.
In the end, it's an eerie horror experience that I greatly enjoyed!
Also, I hope you don't mind but I made a short let's play of your game.
Cheers and good luck with any and all future projects!