I wouldn't say this is drum and bass, more... I'm not even sure. DnB would be somewhere in the 165-180 BPM and have a different drum beat. I suggest a bit of study. I'm not good at genres myself, but this just sticks out as clearly not belonging in DnB, which could negatively affect your score.
Onto the song itself, it would be 10x better with some cymbals, more prominent percussion, and some transitions. Without them, it just feels like there's no progression.