This is actually fun!
1. Interesting implementation of the theme!
2. Visuals really keep you entertained with lots of particle effects and post processing, and of course sprites themselves are really good.
3. Audio is done a bit weird as far as music is concerned: you decided to put music in the menu, but not in the actual game, I would (and I did) do vice versa. I mean, I think it would make gameplay itself more enjoyable.
4. Just a tiny little thing, but I thought it could be worth mentioning: it took me few tries before I understood the controls, like that you have to right click to use an item.
Other than that, it was really fun to play! Good job!