This is a really cool idea with lots of potential! I liked that it was pretty low touch but it was satisfying to see the little faeries fight. The tiles and spawning was well implemented. I could see this being a really fun mobile game.
My primary feedback is that it was a bit short and quite easy. I would've liked to see the enemy respawn a little stronger each time I kill him. It's a really cool idea and would love to see more. Overall great job, especially for your second published game.