So, what do you hate about Universe Sandbox 1?
The fact that when I increase time it literally throws the planets out of their orbits.
Orbits are "made" in frames, the faster you time goes, the less time(and frames) the pc has and it makes it lag + be more innacurate.
For example,
Lets say you have 30 FPS and theres a planet with a 1-hr orbit.
If you run it at real time it will have 30*60*60= 108,000 frames, so it is going to be very accurate
But if you run the game at 10 mins per frame, it will have only a couple frames(less that real time) to calculate its orbit, and it would end up pretty innacurate.