Oh wow, yay! That is so great to hear!
I'm really glad that you and your kiddo enjoyed the game. I hope that it was still a satisfying boss fight even if you did have to watch it!
Also now that you mention it, I never played it on the controller. How was that experience?
It was a lot of fun watching my kid go at it actually! He was jumping on top of the beetle like a pro by the end and doing moves I wasn't probably capable. Controller did fine. I had trouble jumping on top of the beetle myself, because I keeping expecting to be able to move in mid-air like some other people has mentioned in other comments. But that would be the same with keyboard, so not really specific to controllers.