In the options window you can adjust the volume of music and sounds and enable/disable special effects.

To turn on/off the music, sounds or effects, use checkboxes in the left part of the window.

The circle in the right part of the window serves to control the volume. To choose the music volume click the upper part of the circle; to choose the sounds volume - the lower part.

To save the changes and get back to the game window click the button "OK". To undo the changes use the button "Cancel".