Way too rough to give meaningful advice. You can stunlock or run past regular enemies. Way too easy, and the boss is way too hard and doesn't play by the regular rules. I got hit and he didn't even swing his sword.
I'm not sure what kind of this game is, but you should start working on the kinematics. Look at beat em ups or other action games like fighting games. Notice what kinds of thing happen when you hit enemies. Keep it up.