The atlatl, or something like it, already exists in the Star Wars universe. The Gungans have one for throwing their hand-held "booms" balls.

An Atlatl is a lever like device used the throw spears darts or javelins.

The thing the Batearedfrogponies use is a stick that holds a snowglobe and provides little if any benefit.

Proving once again that Gungans have only the most basic, and largely flawed, grasp of both language and science.