Instructions:

Drag the mouse to rotate the view.

Hit the hot keys listed in the upper-left menu to make different things happen.

For example, type 'r' to make the lamp look at the ball to its right.

Once a hot-key action is switched on, you can toggle it off by hitting the same hot-key again.

For example, if the lamp is looking at the ball on its right, and you hit 'r' again, the lamp will stop looking at the ball.

Try out all the hot-keys in the menu, to see what they do.

Then see if you can make your own desktop movie!