Fun game so far, it really forces you to explore. Nice.
Anyways, I made it to the Purifier (I think). I don't actually know because every time I try to enter the room (right after the guy who's like, "you're close to the Purifier"), the game crashes.
Here's a link to the error file, hopefully this helps!
Keep up the good work :) In the mean time, I can try to fix it myself...
PS: I've tried to get to the Purifier on both my Mac and on a Linux (Ubuntu) virtual machine, and I crash in both.
Edit: Just wanted to let you know that I've fixed this myself for the meantime :) (I edited your water.frag shader, and fixed the errors).