I like the idea you have. The intro is actually really nice, but a major problem I have with this little clip is the drum pattern. It feels drowned out by everything else. I don't know if that was just because the clip is short, or if it was intentional, but pretty much EVERY drum and bass song I've listened to has had a crisp sounding drum pattern that was always easy to hear. If anything, their patterns would ride above most of the track, so you could always hear that kick, snare, and hats. It just doesn't sound as nice when it sounds so deep. It has to be more pronounced. You might want to add more to that beat too. Hats would really help out, and making that kick more prominent would go a long way.
And this might be more of a personal thing, but those droning notes from that one synth you have that comes in at 0:27 gets a little annoying after a while. You can do with a little more mixing up there. You could make a nice melody with that thing.
Thank you, that was a very useful review for any future twitch I might apply to the song!