The art style is really nice — the characters look cute and fit the tone well.
You could try using different hit sound effects depending on the type of attack to make the combat feel more dynamic.
I ran into a small bug where I was able to place two characters in the same slot.
It was also a bit hard to tell each character’s level until their final visual upgrade appeared, and I couldn’t quite remember what each sign did after a while. A short guide or tutorial would really help players understand and plan better.
