To change the Wallpaper image you could do double click on the image. Also you can do it from the options menu, where you can also configure the speed, transparency...
To INSTALL You could open the application and press the menu button and select the option to "Set Live Wallpaper". You can also do this from the smartphone menu, looking for the option of Live Wallpapers and then selecting it.
3D Ankh Amulet LWP
This app has access to :