This is pretty epic. I'm digging the detuned shit right now, that's one cool melody. The drums sound pretty cool, but if you're looking to get closer to true DnB I would have turned them up a little. But then again, I'm no DnB expert. (just look at my music and that's obvious)
But the rest of it sounds amazing. That pad at the beginning is pretty spooky, I'm really liking that. Good job.