Inneresting.
It wasn't bad, but it could do with a few things. First, make sure to EQ your drums to make them more powerful. They sort of lacked the punch needed for a good DnB song.
Second, when the buzzy thingy comes back, its kinda soft and hard to make out.
Third, it would be cool if you could have the two melodies going at the same time at the end (with pwnage drums going along too of course)
Anyways, this sounds pretty awesome. Just make the drums more powerful and you could have something great.