This is one of those NES games that sent me scurrying for the Game Genie, which is the only reason I ever beat it. So I'm a lowdown, rotten, dirty "cheater."
I agree with you 100% about the music. I can hum that tune today as I type this and I haven't played Bayou Billy in probably ten years. That theme is sweet.
Is Battletoads really a hard game or is it a game with one or two hard levels? I breeze through Level 1 and 2 only to be forever stuck on the speed bike stages and have never gotten by them. Are the other "action" levels afterwards really that difficult?