Hi there,

the following keys are used by the game:


Left click brings up the cursor to click the environment.
If you click a switch or wheel hold the left mouse button and move the mouse in the desired way to switch or to rotate the object.

Right click switches between free look and mouse cursor.

While you are moving via keyboard, the mouse is automatically set to free-lock mode. Once you stand still again you can immediately use the mouse cursor. No need to use Right Mouse Button.

I just found a very good help how to control the game, after i played through it xD
Press ESC click on the question mark symbol and click User Guide located below the two images.