My small brain had issues understanding what to do at first but once I figured it out I was really impressed by the ideas displayed here. Gameplay wise its pretty excellent, so the things I'd focus on would be on the art style and visual clarity.
Without being on full screen it was pretty hard to see the drawn attack lines especially on a high pixel density screen. Same thing with the enemy side of things, sure I could zoom in but then I'd lose on a ton of information that I would love to access to without having the zoomed out perspective.
Great job, can't wait to see what you can do in the future with this project if you decide to push it forward.