It's a neat mechanic! I really liked the graphics, they were pretty cool. The screen shake was the cheery on top!
I did encounter a bug :/ which was that R did nothing once I had died.
The music seemed a little bit off in mood, as it was in a major key and getting attacked and trying to defend yourself doesn't seem the most happiest thing. But that if thats what you wanted its algoods.
Cool game overall!