Overall I enjoyed the atmosphere, including the music and the lighting effects. It might just be my play style, but I spent a lot of time trying to find alternate routes (thinking the shadows were hiding other paths).
The text and pacing of the story are good, but I think I missed something. It might have just gone over my head, but the truth never became fully clear to me. Still, I enjoyed the concept enough to play through it a second time.
Nice work!