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".
Portrait of Francesco Foscari, Lazzaro Bastiani
The Interior of the Palm House, Carl Blechen
Rue Halévy, From the 6th Floor, Gustave Caillebotte