Thank you for playing!
Yes, that's a problem which came out already, I have it fixed in the next version but obviously I can't upload it now, haha
Basically I'm awarding a lot of points for moving, and I have added a new item other than asteroids (satellites), which you shouldn't destroy.
Asteroids spawning from different directions is a cool idea though, I'll definitely keep that in mind for a new update!
One problem with staying on the opposite sides is you're not going to catch all of the asteroids, there are some spawning on the edges which you won't catch unless you put both spheres on the same side, so you can't go on forever, let's say. But yes it was still a problem.