As long as the center of gravity (c.g. in the simulation) the system is under stable equilibrium.
You can drag the slider bar at the right to change the level of the center of gravity.
Drag the top slider to change the tilt angle of the system.

VIEW or DOWNLOAD ejs xml source
then click to translate strings for selected locale.

Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.