Its a fair attempt...
...but tbh, i didn't like this much.
The drums are good, but that lead that plays the theme tune and the variant of it doesn't measure up to the drums. There is very little bass too, i.e. its not as strong as I would expect, and bass is needed in Drum N Bass, hence the name of the genre.
Also, the voice were kinda poorly used. I'm sure you can't really help them being of lower quality of a clean sample, but seeing as the song was about Fry, shouldn't the voices be of him? They also sounded as though you just stuck them in there.
Theres also the matter of equalizing. That lead (sorry to bring that back up) sounds a bit too loud and high frequency... kinda hurts my ears a bit.
The only good thing about this song is the drums, but all the other sounds ruin them. I recommend you get some plug-ins for your synths or something to make less basic sounds as well, because the lead sounds almost too simple.
Still, I can't go without saying, I can't make DnB drums, so well done with those.