This game absolutely rocks. It feels a bit like Shovel Knight in how it plays and the dialogue and everything. So so good! If you're still planning on further development, good luck! You've nailed it as far as what you've already done.
I agree with some of the other comments I'm seeing below about the boss fights feeling a bit flat. But I also get the time crunch for Jams and just how complicated coding a single boss fight can be in comparison to the rest of the game.
Aside from that the basic gameplay is so satisfying. Challenging, but not brutal. Artwork, sound, and music is also really stellar!