Bulmer is a reference to the surname of one of the guys who came up with the music for the game. He composed the 'old' intro (most of which has been redone for the intro you see today), the game's main theme tune, GFZ1, GFZ2 and the boss theme. Pedants will no doubt hasten to add that he didn't really 'compose' the main theme and it was stolen from Sonic & Knuckles blablabla yada yada, but he came up with the first MIDI file which was used for the next 10+ years, and it seems to have stuck! ;)
He, like AJ, is an enormously talented individual. I believe he and his girlfriend are now working on their own comic book series...es these days.