hooray for a first review!
I like how this loop starts out with small sounds, and then builds up later. I think it's okay, but for some reason, while I was listening to it, I wanted a little bit more variety somewhere in the middle. Also, for me it's a little less dark than what I expected. If you still want that subtlety, maybe you could make it creepier? I don't really know.
It's also good that it actually loops well, and that you can make music.