Wow, that really came together. I loved the effect of the creepy music, the simple yet somehow also creepy tiles, the lighting... how everything was in shadow and then... pure white of the creatures' eyes.
The only nitpick I have is that sometimes, because of the low contrast, I guess, it was difficult to see if something was a "wall". Not a problem to walk around an object once you hit it... but it did take a little bit away from the atmosphere of it all.