I like the concept and the visuals! The game is a lot of fun to play.
However there are some thing that I feel like could be improved. For example adding a short invincibility time after the player got hit. If there is one, then it was so little it felt like there was none.
Minor thing, but once there was an enemy I didn't see, since the HUD mostly hid it.
Also, somehow I got the game to play in slow-motion - everything happening at about half the speed. Might be that you temporarily slow down the time when an enemy gets hit, and it somehow stuck?
But over all, I had fun playing it :)