Gotta say the illustration is really nice! I obviously like red and blue themes, as well as Japan related stuff. As for gameplay, I did find it a bit awkward to control, especially in this day and age where WASD is more common.
Also would like to have some kind of distinction to the background in the 2nd boss fight, the fast train movement does make it hard to see what's going on. Another thing to consider is to let player manually charge the special attack, so there's some decision making involved when to let it go. Sorry for me being nitpicky, I do see potential in this game and obviously I'd like to have a better play experience because the setting, characters, designs are just drawing me in!