I really like the concept! Love the idea of needing to juggle between parrying and dodging projectiles and the screen space being your health. Art was simple but good, and the sounds weren't that bad.
I think the only real issues are that I had to zoom out to actually see the entire game, and that I never knew when I was parrying correctly, there wasn't enough feedback on it.
Overall a really good game! I had a lot of fun with it, even though the lack of feedback on the parrying got frustrating.