Use arrow keys to move the camera or activate the joystick from the menu.
You can zoom from the menu or press keyboard keys "Q" and "A".
To change the number of pieces select the horizontal and vertical amount from the menu and then press "Create".
The Battle of Alexander at Issus, Albrecht Altdorfer
The Interior of the Palm House, Carl Blechen
The Great Wave off Kanagawa, Hokusai
A Calm at a Mediterranean Port, Claude Joseph Vernet