Really impressive stuff here. Short but filled to the brim with atmosphere. The style used here reminds me a lot of Resident Evil 1, especially the way the doors open at the start and end.
Only thing that put me off was the quality of the writing for the books. Most of them could have used some work with grammar or story telling. They were still able to get the point across though, and service the story well.
Also it might be nice to allow for speeding up of the description text when you look at objects. If I have already read "The restricted section is quite messy..." a few times it would be nice to be able to press enter to speed it up.