Really enjoyable experience! I really liked the art, and the interpretation of the theme! The sound design was also superb and I really like all of the sound effects, they fit like a charm!
I don't really have any strong critiques for the game, I have to say that you did a really good job explaining the mechanics in the start! One thing that did bother me a little though was the timing. I feel that some times I missed the parry window by just a small fraction. I feel that a little more leniency towards the input timing would have helped a little. ( I was struggling a little with the timing as in the start I was pressing the input button at the end of the 1 second and not 0).
I feel that also the game could have been a little faster, making the player act faster rather than "wait out" the countdowns.
Regardless, I think the game is great and I can see all of the work and effort that was put into it! Good Job!