This one was a lot of fun! Excellent use of the theme and I'll be honest, I'm amazed that you were able to make that flavor of movement and physics feel intuitive. You nailed it with controls!
I did have difficulty finishing the second boss because I would pretty routinely get trapped inside of him during a spin and just get thrown off-screen to never return. I restarted a couple of times and found myself in the same position each time.