Pretty fun. The sword sound is quite satisfying and the art looks pretty good. The character slowly slides down slopes when standing still, kinda weird. Also mashing X in the air against a wall just makes you float around forever, seen many games do that and I never was a fan of it. Overall the combat feels a bit stiff. I've noticed you have some inputs (up attack, down air attack) and it reminded me of smash. I feel like giving the character a similar moveset with the classic airial attacks and tilt attacks could work great. I play a ton of smash though so I'm biased and maybe that's not something you wanna go for. The input window for the inputs felt quite tight aswell, I couldn't do it consistently. Not sure how much (if any) buffer window you have implemented but I feel like it could need a couple of extra frames.
I stopped at the first boss though, might give it another attempt tomorrow and check out the other levels (It's 1:30am I need sleep) You can't just hit me with two bosses back to back in the "tutorial". Especially not one that has giant shield shoryuken projectile.
Also I clipped into a wall once and had to restart.