I just finished this game and i'm honestly surprised after about 7 tries to get it working because it constantly want me to stay on japanese when i did launch it as admin, but after that it looked alright but i can tell there needed to be some small improvements to make it a bit better.
1: The major issue with the game it's the controls, i took me a good while to get used too but the moment i get caught and i want to move the camera around i can't, it only allows forward and back movements and nothing side to side which i found very annoying, it is supposed to be a 3D game but it plays like a 2D one and not being able to move the camera to get better angles feels bad, especially with the first 2 bosses which take up litterly half of the screen.
2: The level up system feels very limited and kinda boring with only 2 options being health or ultimate meter, the other things you can buy is different clothes but i only found one that i went with, it really needed some more options like speed or strength.
3: The hit detection needs to be worked on because there's been many moments when i attack something and all of a sudden i get hit when i'm fully behind them like with the slimes, other times even if i attack something in front, they can just power through it and disrupt my attack, i also find that the combo play is very limited as i thought you could do more air combo's but you can't and that leads to very stiff combat, this could be better.
Those 3 are things i noticed with the game that really could be fixed a bit, one more that i do wanna mention is that the game feels a bit short with only 3 main levels (not counting the tutorial) it needed atleast i think 2 other levels on top of it and it would hit the sweet spot, but other then that it still was fun but yeah with how hard it was to even start it in english and the other parts i mentioned, i honestly would still give it a 7/10, could be better but it's still a good game.