Interesting concept. I liked how you combine roguelite elements with fighting game. Also, it looks great, really like the style.
One issue I was stuck early on is, that you are taught to click throught the dialogue with spacebar. But then suddenly you are tasked to click an option with a mouse. It is not clearly indicated that you are supposed to do something different (the button does not highlight when mouse is over it) and the text still indicates that I should press "space".
What I think might also also improve the game is a bit more responsive combat - like right now there is a little pause after an attack where I cannot do anything, which was very annoying to me. Then the little things like showing my characters health, showing graphically what each upgrade option does so I do not have to read the whole text.