Fun game. I really liked the boss design and variety in attacks. They are felt very unique. The stunning effect combined with having to hit weak points makes for an interesting experience. Art and visuals are very pleasent, and the audio complement the visuals well. UI is well designed too.
For improvements, the ones mentioned in the Progzzy stream (zoomed out camera, tighten up controls, make it clearer where the world boundaries are, some bug fixing). I also suggest a minimap, especially for the grand finale fight and the swordfish fight, although just improving the camera/world boundaries could be enough.
All in all, I enjoyed your submission. Just needs tightening up. Great job!