Too hard! You can't even hurt the guy.
He's always facing you, hitting his cape doesn't hurt him, when he pops up near you are 'hurt' and you can't do anything, if he pop up entirely on you you get hurt and hurt till he goes away, if you leap over the fire you can be safe, but the very moment you do so he dissapears, if you try to leap over the flames and swing the moment you do that you'll be hurt, and the attack will stop. So he's invincible and it's all your fault.
A temporary invincibility would be nice, you know, when your guy's hit and then he flashes for a bit till he can take damage again?
The ability to whip without the guy being in the 'standing' pose would be nice. And the lack of any secondary weapons sucks.