Well one problem I can point out....
It's drum and bass...yet it seems it's mostly revolving around the drums. In fact they were a little too loud, so I couldn't really focus on much else, unless that's the point with Dnb no idea. Yet I have to say with some louder synths and bass this would most likely be some cool shit. Also, about a minute in, the drums were kind of obnoxious in my opinion... Would it be wrong of me to suggest (knowing that I know nothing of dnb) to have a mellow part, followed by a breakdown of some sort? Maybe toss in some other snares, or some toms? sounds like it'd be cool to me :P