I'm generally not a fan of fighting games so I feel a little under-qualified to comment, but here goes :)
Good game overall! The writing and art were fantastic, especially the bifrost. My only comment there is not to info-dump everything at the beginning. Maybe a little intro, then play a little, then more backstory, then more game... you get the idea.
Controls were super smooth and made sense -- no complaints there.
The core gameplay loop is solid, but it seemed silly that I could just mash the "parry" button until an enemy hit, then easily destroy them. It made going though the enemies no challenge at all. I'm sure this could be solved with different kinds of enemies though.
I do wish the game was a little more fleshed out. I hope you keep working on this and develop it into a full game, because I would probably play it despite my general aversion to fighting games!