Great job, but minor details
Let's go ahead and start at the beginning of the piece. Really cool and really gives a good forshadowing to what is soon coming, but I wish you would drag it out a little bit before you went into the intro with the strings. It was just a little too much too soon. Milk out mysterious beginnings a little more. They just make the middle seem so much more intense.
Alright, now when you get into the "melody" which was hard for me to find which instrument had it, which has it's own affect to people, so I won't let it hurt any score, but you have this snare which actually bothered me to no end. A bit too loud and you need to use rolls a little bit more sparingly. They should be more of a gateway to the next phrase.
The spaces you used to quiet things down a little really made this song pop out and I really loved it. It gave it this wonderful feeling of contrast you don't normally see in songs.
So, just one more thing. I had a hard time with the quality, and it's hard for me to say that because quality can be blamed on many factors, such as money, speakers, programs, you name it. But one thing of the quality that was bad was the shortage of reverb. This is a song where (especially in the more quiet parts) a little resonance can go a long way in making more of an impact.
I have yet to even see if you have other things out, but might as well check because this song was overall really good with some small things that need some improvement. Good Work