I really loved the art of the game! It's really clean and polished. Also, the music fits perfectly to the game.
I like the concept, but for now, I can just ram through everything without any consequences. I hope this issue gets fixed with the enemies and bosses you're adding :)
Also, there wasn't really any way the game told me how well I did after dying. And the death was too instant and didn't have a 'satisfying feel' to it.
I really love the direction though, and I'd love to see where this game goes in the future!