Updated some images and fixed some bugs

There was "Mute Sound" bag that is fixed. When you build WebGL game from Unity AudioListener.pause works only localy so I have to change that to AudioListener.volume = 0 or 1 in order to mute or unmute.

Added QuitGame function, but that also have no sence on WebGL build so let it be..

This update also includes some bug fixings and code refabricatings