Very good demo! The game really has a lot of potential! I loved the use of combos and wide variety of moves and skills!
What I think can improve:
1. The character movement. She moves as if she were sliding! This can be a trouble in precision jumps or even positioning close to enemies.
2. On the boss I had some problems with a hit box, it could be something related to point 1. When the Boss use his jump attack, it was like he hit me... even without hitting me... if you know what I mean!
3. It's good to do some research on the name of the game! It seems to have others games with the same name or similar! It's better to find a name more unique for your game!
I really liked the project and I believe it has a solid base! When you creating a page on Steam let me know! This one definitely goes to my library! ^^