I really like you take on the theme and how you made it a core gameplay mechanic. The first real fight was a surprise and I was instantly on 1 HP, so that's a steep curve after the relaxing intro part, but I guess that's just part of the design. I like the reflecting mechanic, at least after I managed to learn it.
My only issue was the audio, it might just be my personal taste, but it became annoying very shortly.
Overall, a very consistent and polished game in one week, congratulations!