There's no easy mode but Mofu plans on adding more items in the future that will make gameplay easier. So far what you can do is to use the bow since it makes the bossfights fairly easier and also buy some food from the shop to regain your HP.
I don't consider her to be a boss since she is indeed fairly easy to defeat. The bow works quite well, but switching to food during the fight, eating and dodging at the same time is what is giving me trouble. Also that when you get hit, you tend to end up in an endless combo of attacks that kill you off. Maybe some sort of "safe zone" would work? I can't imagine I'm the only one having trouble with that. I must say I'm used to play with a mouse, what makes things easier. My eye hand coordination on a keyboard is not that great, so I need a "fixed" hand position on the kb or I need to look down and that kills me too. I am used to do fairly advanced fights in other games but with a mouse. I already changed key bindings to the ones I'm more used to but no cigar.