DnB was definitely unexpected. Got some nice lines, all flowing together and structured pretty well. I think if you're going to use what sounds like stock instruments for your drums, I would do some wild ass processing with them -- for instance I really like playing with distortion, pitch shift, ring mods or bit rate changes.
There are lots of free synths out there like 99sounds drum machine and aggressive drums which would also help out here.
The square bass is a nice sound but also doesn't offer a lot in the way of changing tonality, which is what dnb is ... now known for. Try some fx and modulate different parameters of them to say, the kick or snare, so that the audio output of those moves some knobby knobs. I'm not sure what DAW you use or what those would be called in it, but you get the idea.
Good work :)