This is a pretty cool song and I hate to be that guy but I think it needs more bass. I don't usually do drum n' bass but a couple of the sounds you used could be a little bassier I think. It may just be the speakers and headphones I'm listening to this on. Somebody else listen to this and tell me if I'm wrong.
That pause at 0:44 was cool. Sometimes silence is just as effective as sound in music if you do it the right way and I think you did it right.
I like the chord progression. The high pitched notes that come in around 2:09 are cool too. They sound a little off but it still works.
Overall, good song! (insert academy record joke here.)