Good idea : a FD (free draggable) in a closed room full of balls I was surprised going down the cave not to find the star (I must have sent a ball there - not on purpose ?!) Nice and easy, thanks for sharing !
@Martina FD stands for Free Dragable. FD is the Dragable which are attached to any Motor or Slider. They are free to move anywhere possibly. My FD (the Ball pusher) got stuck between Rails.
