YOUR FIRST DnB!? huh? You're lying to me. I'm, first of all, in love with the synth you choose for the beginning. It was a straight hook. :41-:50, i think you should try another bassline synth. The one you used seems a bit distorted and the notes can't be made out too well. BUT, 1:35 onward, man...I really, really, really, really, REALLY liked it. I love the beat, and how at 2:17 the song fades, but it doesn't just fade-- it like, seems like its going underwater. I LOVE that.
For your first Drum N' Bass song, i can seriously tell that you have some potential in doing this genre. I would definitely suggest that you consider doing more in the future... wow.