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 Triumph of the Immaculate, Paolo De Matteis
Unconscious Rivals, Lawrence Alma-Tadema
House in Snow, Henri Le Sidaner
Jeremiah Lamenting the Destruction of Jerusalem, Rembrandt