Luigi is actually supposed to play like in Lost Levels, the programmer tried to match the physics for both of them. He ran an emulator in the background and controlled both at the same time to test them. I think the main issue is just that ours gains speeds a bit faster, I'll let him know and he'll probably fix it in the next big update.
I think our music guy is gonna post downloadable versions of the Blaster Master music on his site, once they go up I'll post a link here.