It might be fun to add some kind of visualization showing when a body has enough energy to potentially escape the system.

Question, can you mathmatically plot a trajectory across time X and energy required to see when it's met and how long it would take given a start position or something? Or is the simulation so complex that you can never project. Oh never mind I see answers to this elsewhere here, cheers.

Agree. I was hoping perhaps it would "flash" or do something visually different to indicate "Bye bye!"