The art is nice and the gameplay is pretty good, if a bit simple currently. The sprites disappearing when damaged is kind of confusing though.
The speech bubbles don't really work very well currently, as since they're static, it's possible for the player to move and the speech bubbles no longer look correct. The first speech bubble also doesn't seem to be placed correctly relative to the player. I also feel the font doesn't really work with the aesthetic of the game.
The way the cooldown for the items is shown also doesn't really look at home with the theme, and perhaps a more simple way to show the cooldown like a bar that fills might fit better?
They're all very minor aesthetic issues, but I feel improving them will greatly enhance the experience.