The track has a very chilling yet pleasant atmosphere. I love the music box and piano's melodies and arrangement.
The only thing I really dislike here is that the song seems to build up too quickly after becoming quiet. The pad and lead don't get a chance to fully fade out, and it sounds like their current fade outs aren't automated at all. It seems awkward to me. There are several aspects of the track that I become accustomed to after a few more listens, but this isn't one of them.
I would have liked to hear the snare increase in power as the climax progressed.
I'm not fond of the melodic lead. The base sound is okay, but I think it could benefit from having more release as opposed to being played continuously.
Overall, this is quite an interesting and enjoyable song that has a high level of originality.