Use the left-hand menu to add a new body to the system, and the right-hand menu to control the simulation (play/pause, speed control, reset, and remove bodies). You can also click and drag on the screen to see the simulation from different angles!
As many as your computer will render! Note that there is a limit of 5 stars as the graphics engine used only supports 5 light-casting objects on-screen at any one time.
Currently, the Euler method is used for integration, but other methods are planned to be added soon!