Do you remember an old toy called Magic Screen (also known as Etch A Sketch)? This is iPad version of your beloved toy from childhood. When you spin left controller drawing point moves vertically (top or bottom). Right - horizontally (left or right).
To clear display just shake your iPad as it was many years ago :)
Setting opens when you press button "Magic iScreen".
And in settings you can change surface.
Icons for iTunes store, application, setting and spotlight results.