Really good game! Concept is intuitive but really makes you think, can definitely see it being pushed further into a longer game, though that might lead to balance issues later on. Art was charming as well.
As for criticisms, while I do appreciate the game's short length and easiness, maybe making it a bit longer and giving the player more options for items, enemies, etc would have helped to add depth. I also think the music was a bit repetitive.