That's a neat concept; I was a little angry when I spent forever farming up and then got an enemy spawned on top of me without much warning and died instantly, though. I want to feel at least like my lack of skill ended the game for me and that there was something I could have done differently other than be in the wrong place at the right time, lol.
I like the art, and the characters are cute, though. The game has much potential, but a little more time and effort is needed for the player experience.