The beginning of this piece is so uncomfortable to listen to - and I mean that in the most positive way possible. I think it really speaks to the subtlety of the creepiness in the artwork. Overall, I like the composition a lot - the slow, foreboding dissonance slots is a good approach to the "impending doom" that's written all over this track.
If I had to nitpick one thing that truly bothers me, I think the creepiness kind of gets subdued by some of the MIDI sounding instruments. Like the piano chords at 2:11 feel like they could have had so much more weight to them if they sounded more acoustic and less MIDI. By the time we get to the 4 minute mark, the soundscape feels like it's just missing a lot of that raw power it had from the beginning.
But I do really like the low bassline when it does that little pitch slide and doesn't quite make it up to the pitch it's sliding up to in tune. I guess not having a lot of instruments did help to bring that out. I enjoyed listening to this, even if it does make me feel like something is coming to get me. :P