What a beautiful game, the pixel art planets are breathtaking and the sound design is absolutely on point. The intro songs for each fight slap and add a great game feel. I adore the main menu with the planets in the background hinting at the future bosses, and the sfx for hovering over the button and the transition effect. The planets are so so pretty. The UI is very well designed and takes up only the space that it needs to. I also loved the "overworld map" of the ship moving to the next planet, it gave a nice break to the action and gave a nice bit of foreshadowing for bosses to come. I found my playthrough to be a lovely experience.
A couple of constructive criticisms: The elliptical control scheme was very interesting but I never really got the hang of it and felt at the mercy of the boss attacks for most of the time. This made for a pretty cool space feel but not a great gameplay feel. I think swapping the rotation controls for the ability to move along the ellipse path would have felt much better. Also, I think for a game jam it would be nice to allow the player to restart at the current boss after dying rather than from the beginning. I know it is a boss rush but I would have appreciated being able to restart at the current level. Another minor thing is that I found the 3rd boss to be very easy compared to the 1st and 2nd boss rather than a continution of the difficulty curve.
All that being said I think this was a great take on the theme with innovative controls and jaw-dropping pixel art. There is a great deal of polish and the UI is outstanding. Awesome job team!!!