Perusing the ol' Newgrounds Drum & Bass to see what's been going on with some artists. Yours being the first I come across.
Very interesting approaches. You've certainly worked quite hard on this. Many subtle nuances to fill out the track. That "Ah" that is panned left helped to spice things up. Ambiance is placed very nicely in the middle. You're missing a bit of the low-ranges to the ambiance to add more of the "rumble" to the track, since the sub-bass lacks some of that warmth and meaty-ness.
Bassline is pretty well constructed, save for another underlying bassline to fit inbetween the sub (low) and the top layer high-fi grind (high). Always think in terms of the frequency spectrum and how much you can fill out. If you can cover the broad ranges: Low, Mid, and High, you'll start noticing that things will start sounding more "full" and more rounded.
Drum kit is also well-constructed, but... you're really missing out on many aspects of it. You've got the kick, you've got the snare, and the hi-hat (and a very quiet one panned far left for effect). It's missing a lot of the brightness of a real drum kit (hear me out here, because in the way I do things, and it's just my opinion, I always think of a real world setting when I compose my tracks), and while you've got a crash coming in every 4 bars, with it coming back on the 1, it does make for a good transition.
But, it doesn't hurt to round it out with a ride panned slightly left, a very low open hat/crash hitting along with the kick, a couple overheads... ya know what I mean? The kit does sound a little dry as well, so you could certainly throw in a reverb and give it some room to ring out.
All nit-picking out of love for the track aside, this is pretty good. You've got things down quite well.
-Regards,
J.P.