The whole door hiding spot thing was a pretty good way to make sure the player doesn't see the monster and let their fear do the work..
Looked pretty good as well did a nice job on making it feel like I was in a sweaty basement..
I played on web build and I found a tiny little bit of jank with the mouse a few times snaping from one place to another, but it didn't really break things so it's all good. I don't know if that's your game or something with my laptop but still. (edit I learned your game wasn't the only one that did this so yeah, not your bad likely mean or unity's)
After I built the weapon, I avoided the radio it was telling me to use so I'd see them then I held down left mouse button.. It just went black and dumped me to the titlescreen.. That means I won right? If so.. I understand time limits and all. But a little "you win" couldn't take that long to make, yeah?
So to sum it up.. It could use a little polish but all around I liked it and thought it was well designed with good art and sound.