This is an awesome art style, I love looking at this. From what I could play, the mechanics seem like hit-detection needs some work. However, optimization seems to be a major issue. Granted, I have older hardware, but this game doesn't seem like it should overtax my system. The game runs very slowly.
I will be keeping an eye on this, and I absolutely encourage you to keep working on this novel title. Do you have a Discord server for the game?