One of the best games here and I hope you read this, I'll make a pros, cons and suggestion list but besides that this is gonna go in my top 5 itch.io games
Pros
-Stunning pixel art animations were it's not to complex but not to simple at the same time which is quite nice.
-Great gameplay with all the attacks and variations you can do.
-Very fluid and not at all buggy in my experience.
Cons
-Lack of a tutorial
-No customizations of controls(I understand there is a large and diverse pool of options but the ability to customize your controls can make a game 5x better and easier to play).
-No online play(I know it's costs money to keep up a server so if you can, start a go fund me and make a server were you can play with friends by entering a 6 digit code. This is a long shot but if you do get funded, first of all I recommend placing a Japanese background with a Sakura and that there's always Sakura flowers falling, second make transitions when choosing an option so it's not so robotic and finally, to expand your market, add the ability for mac and Linux compatibility).
Suggestions
-More character customization like a different sword color or more hats and masks like maybe you could add a traditional so-men or kendo face guard or maybe samurai chest and body armor.
-Add a dummy to train with or at least a tutorial, I had to learn the ropes by myself and the text you had written, it's quite annoying and made me almost lose interest at the beginning but luckily I didn't and here we are.
-The ability to do combos in a quick but not instant(because then you wouldn't be able to block) succession so you could make it a bit more of an ability and not just spamming gameplay.
-This is less important but wouldn't be a bad add, make the maps have variation like platforms on which you can jump on but since this will cost a lot of time and effort it's not that important.
This is one of my most detailed comments and probably one of the only 3 games I have added to my collection and although your probably not going to read this, you have a great game with great potential here so stay safe, do what you love, and have a great day.