i disagree the only thing semi hard about it is the bad camera angles at some points and the crappy combat system but I can still manage around that. M.C have you tried battletoads on an emulator or something yet? a nice challenge for you and it's not broken, also ghouls and ghosts, super ghouls and ghosts and ghosts and goblins are all nice challenges for you.
I beat all of them some years back. Battletoads was fun for the 5 hours or so it takes to beat it, some challenge to be had, highly overrated game overall, though. I never found ghouls and ghosts hard, like.. at all, in fact I never found it to be a good game either.
You can disagree, we all find challenge in different places.