I like this song a lot. The melody is awesome. Besides that, there's not much going on to keep it intresting though. The instruments are awesome. I like the marimba-thing that has the main melody with the support of the synth. Those two just seem fit together pretty well.
I think the drums could be mixed in a bit louder. At the moment, I can hardly hear them. I don't really know if this fits in drum 'n bass. I don't feel the fast rhythm and typical dnb drums.
Also, I think the bass is a bit too soft. It is a sort of combination between a subbass and a typical dnb bass. You should make a decision. If it's a subbass, don't make such a melody. It it has to be a dnb bass, make it dirtier.