Impressive
This has a very very menacing ambiant feel to it.
At the beginning you had a slam and hi hat sound. I think if you echoed and reverbed that slam, and took out the hi hat, that would proof to make it a very dark addition to the song. A door slamming to a face of a maniacs victim? Who knows.
Your mix of sounds and dynamics was pretty damn good, I would think perhaps making that cello sound in the background a tad deeper would serve to make it a bit more powerful.
I thought I heard some kind of voice in the back, if I heard what I think I heard, that was incredibly well done, really gave me a scare.
Some ideas.
Perhaps an organ? I know the song would lose it's menacing ambiance, but it would take on a darker feel, a more vile, corrupted, ruthless feel.
To go with that organ, I would also think a nice deep bell, echoed and reverbed as well of course.
Nothing more to suggest or criticize, I really liked it. I would like you to check out some of my stuff sometime ^^. 5/5 from me, keep them coming!