hello, thanks for playing. the bosses operate on the same playing field as you, so they also gain or lose spin based on the spin direction of what they collide with (you can check their spin direction next to their spin gauge (aka hp). you defeat the boss by emptying their spin gauge or overloading it, same as player. as for switching views, i'll see if i can figure something out while there's still time.
glad you enjoyed the music :)