This game totally blew me away! You have achieved a great level of quality on all fronts, you really nailed this. I really would like to see a full length game with this concept and this style. I love the pixel art style, the music, the colors, the design and the gameplay, so basically everything about it :).
I love how the game blends genres and I can see this being developed into a great roguelike where you ''deckbuild'' with different ingredients that can roll into your inventory and purchase items along the way. The twist where you heal the characters instead of defeating them is just so clever too. Massive props for the great tune too. Five stars!