Is there an upper range on gravitation? I can't seem to generate a proper singularity. Even from a dead start adding too many planets in one spot causes them to start flinging outward.

Anyway, how about a game where at the start there's an asteroid and an arrow on the side of the screen showing where a comet is going to come from. You have to place planets and choose their size/mass to try and make the comet strike the asteroid. Bonus points for getting the comet to do loops and tricks?

Is there an upper range on gravitation? I can't seem to generate a singularity.<br /><br />Anyway, how about a game where at the start there's an asteroid and an arrow on the side of the screen showing where a comet is going to come from. You have to place planets and choose their size/mass to try and make the comet strike the asteroid. Bonus points for getting the comet to do loops and tricks?