Hm, hitting the win with one of the two FDs is easy. Guiding B to the win is also easy. I do not see the purpose of the balls. Are they ornamental?
I rated to 1 star to show you that FD (free draggable) can easily be dragged and dropped on the win so always use a slider with all draggables so this can't happen. Spoiler: FD win I also played the level to win with B and that was very easy as well. The level looked unfinished - maybe clean up the extra stairs and wedges?