Yeah, ghosts and goblins is INSANELY hard, but I would like to add a few games which I have a little trouble with.

Double Dragon: The part where you have to fight the two giant guys is really tough and I was only able to get past them once only to die in the friggin cave after the fight.

The Adventure of Bayou Billy: WHat the hell is up with the main game? The first level characters are really strong.

Advenutres of Dino-Riki: It is fun, but you get hit once and you have to start back at the beginning. really tough.