With one - tap you can change the looks of the system; icons, wallpaper as well as lock screen wallpaper. (phoneradar.com)
Add Lock screen wallpaper slideshow Change wallpaper every time you wake up your device. (zenpad.org)
For example, you can win exclusive lock screen wallpaper (pictured right) by defeating Mega Man 1 Robot Masters within a certain time. (gaminginstincts.com)