Was enjoyable for that first run through! I like the concept of a high/low block for a 2d combat game as well! Definitely have to take full advantage of the space you /do/ have available when in 2d, and handling blocking like that is definitely clever. Would love to see that feature embellished like others have mentioned, with rewards for well timed parrying, maybe jumping & dashing, etc.
I agree with other reviewers about the enemy health being a bit much. It makes sense to try and extend the game, but honestly you should seek to provide people with more activities in-game to keep them playing, not more health to keep them from finishing your game too quickly. I totally get wanting to have the game be longer, but you could definitely have just added more instances of the same types of enemies to extend the game with /content/ rather than inflated difficulty.
Overall I enjoyed the experience of figuring out timings for fighting the different enemies, and there were no game-breaking bugs, so good job!! And Thank you very much for taking the time to read my review, I hope you had fun working on your game!