Enthralling
I started a little after 1am. It's now nearly four am. I admit to resorting to a walkthrough (I'm sorry, but I need my sleep, and I'm not doing all of this over again.)
All that is beside the point. You've got a good, entertaining, transfixing game here. I'm not sure why, but it's addictive. I think it might be the freaky storyline. I like that sort of stuff.
I have only one complaint: the music. It's TOO good. That seriously freaked me out. I was looking over my shoulder every few minutes, just because of the music. And you included a mute button, so that's not even really valid as a complaint.
Also, I want to make it clear that this is not a complaint, but just something I think I should say: the game is hard. As you know. Obvious, sorry. Now, like I said, I'm not complaining. The sky is blue, air is a gas, this game is hard. It just feels like something I have to say, even though I don't really have a problem with it. Glean from that what you will.
Anyway, good job!