Expand it!
The atmosphere is very dark and ambient. I like this, and it is well made. I also think that you could expand it and make it even better. What you have here is an excellent start and it makes for a great loop. It could, however make for a fantastic full length song. I can't find any faults with it other than the length, so great job!
Also, I like to review on a review for review basis, so if you could check out our newest song that would be great!