Options:

Warning: If a option is in bold, it requires a reset to take effect.

Simulated Time Per Frame (seconds):
Framerate (FPS):

Simulated Time Per Second:

Walls:
Velocity Cap (set to 1e100 to disable):

Currently there is no code to create a custom simulation. You should be able to create a custom simualtion using code by overwriting the sim variable using the devtool's console. If you want to do this, I would recommend you look at the source code for the site. The file that controls the simulation is located at https://github.com/TheHeroBrine422/spaceSim/blob/main/v2/main.js

If the bodies move off the bottom or the right of the screen you can zoom the page out using control+- or the menu in the top right of your browser and you should be able to see the planets again.

Presets:

Inner Planets and Rogue Star Simulation

Inner Planets Simulation

Unstable Three Body Simulation

Semi Stable Three Body Simulation

Random 6 Simulation