Hmmm...

I got all the stars! Some bits were confusing to me and the ball couldn't be moved into the hole - it needs to rest ontop of a curved block for B to be able to push it. I kept getting knocked down too, my fault!

To solve it I had to keep climbing back onto the floating blocks (using autopilot) and moving to each lower section that way.

A lot here to explore, which was good.

Hi & welcome... well,difficult to rate because of the FD (Free Draggable)... you can use it to cheat but I tried to contextualize it & only used to carry B across the low part to take the stars. I did not use the ball. Thanks for sharing @Stefan Kucap