Distance Problem

That certainly exercised the brain cells.

I explain this level. Although the number of balls and the distances between them are correct, it's not difficult to prove that it's still impossible to shoot all 16 bots down directly with 16 balls. However, the draggables can change the distances between bots if used properly, and that's how to complete this level.
I put my way to succeed down. Of course, you can have other ways.

Spoiler

Number bots with 1 to 16 and pairs of balls with 1 to 8 according to their orders.
1.Ball pair 1 shoots bot 1,5.
2.Ball pair 2 shoots bot 7,10.
3.Ball pair 3 shoots bot 4,6.
4.(The most important and difficult step.) When bot 16 walks next to one of the draggables of ball pair 1, click on the draggable and move it slightly to make bot 16 stop walking until the distance between bot 15 and 16 is 5 squares, then release the draggable.
5.Ball pair 4 shoots bot 11,14.
6.Ball pair 7 shoots bot 2,3.
7.Ball pair 6 shoots bot 8,9.
8.Ball pair 5 shoots bot 15,16.
9.Ball pair 8 shoots bot 12,13.
Now B can go to the win block.

@oiiiriei…i thought that i had cheated but i see i had the designed gameplay!