the full committal to the obtuse control scheme is pretty cool. I had a lot of fun trying to figure out the rules of how the orbit changes. I think this idea is really well executed.
But I really don't know how the controls work. I just got a feeling for it, so maybe I was lucky.
I think the bosses do a good job of pushing the player to learn how to orbit and use the mechanics that are given to them. They feel maybe a little same-y though.