Good, but I have a few complaints.
1. The outdoor pace of walking was fine, but the speed that you walk while indoors or in the fog is really just too slow, especially because you often have to double back to figure out puzzles.
2. The atmosphere/lore stuff is creepy, but it is also very disjointed. All the different plot points are getting jumbled up and it doesn't make any sense. Like all the random things in the bookstore ("Shai-Za," etc.). Seems like you're just throwing in random things to make it seem mysterious, but it's really just confusing.