There were a few too many jitters, I lost once because a planet popped out randomly, and sometimes collisions were a bit less accurate than I expected - two things that were clearly touching didn't merge
Viewing post in Limited Space, in Space! jam comments
I didn't notice any jitters or popping in my testing, maybe there would be settings to fix that.
Did only the outlines touch? Those are actually outside the collider, only the actual planet accurately represents the collider. I should have changed that. I added the outlines later and didn't even think about the colliders not being accurate anymore.