A nice game over all, I think it's a little bit hard and the controls take a little bit to get used to.
A bug I noticed is that the music repeats the same note when you transition between scenes. One way this could be fixed is by pausing the music before you switch scenes and unpausing it after the transition
I find it annoying with how the basic enemy attacks. The fire ball thingy follows you, which makes it hard to fight and block the attack at the same time.
Something else that I would make better would be to make the character jump stronger