Like you said, how can I describe your track exept with aaaaaaaa. Like probably most people said, I really like this first part, the atmospher is just good. Some transitions are a bit too fast, but overall, they still work. I haven't played PSMD, but I've heard its soundtrack, which is a good one. I also like the upbeat part, and the contrasting dark part that somehow fits in the music, similarly to the same part in your Dark Matter track. The piano in this is just amazing, well done.
I read some other comments, and I aggre with some one the fact that this is a rhapsody.