Pretty good. I'd suggest that when you're making a big transition in DnB, it's usually a good idea to do 1 of 3 things:
1. Use a riser that leads up to the transition, and a boom or falling synth directly following it. This makes the transition less abrupt.
2. Stop the drums for a short time (1/4 or 1/8 of a measure is fine) right before the transition. Sometimes it's ok to leave in things like just the hi-hats. This technique doesn't make the transition less abrupt (if anything, it's more abrupt); rather, it creates a sort of mini-drop, making the transition flow better.
3. Create a drum break right before the transition. This is the most fun, yet most challenging out of the three. It also sounds more impressive. The way I go about doing this is keeping the same drum pattern, but then adding more sounds which follow in rapid succession with lots of alternation (like kick, snare, hi-hat, snare, tom1-tom2-tom3). Then, remove some of the sounds that make it sound cluttered. Usually, it's not good to have a sound every 1/16th, but if you do, make those sounds either the same (or similar) sounds, or make them extra "filler" sounds with hi-hats and rim hits.
Anyway, I hope this can be helpful in your music making endeavors, I look forward to seeing what you make in the future. ;)
Also, forgot to post this yesterday, but here it is anyway. My 18th-birthday jungle jam (I made it in an hour and a half ok pls dun h8 me):
http://soundcloud.com/lloid-1/one-eight