In terms of scoring points , how will we know which stars we scored in the opponents zone maybe they move them? Or will the ref count the points

You’ll have to keep track of them yourself during a match. Just look over the fence. For the final score the referees will count the points.

It doesn’t matter how the stars got to the other side. At the end of the match, scores are tallied based on how many objects there are and what zones they are in.

The points are not about who can throw the most stars. They’re about who can keep “clean” their side of the fence the best.

Therefore, it doesn’t matter if that star was thrown over or not. If it’s in the zone, it’s scored.