Keyboard Controls:

Camera movement:
Move forward: I
Move backward: K
Reset camera position: R
Drawing control:
Toggle walls: W
Toggle lights and shadows: L
Other commands:
Take screenshot: P
Quit: Esc

Mouse Controls:

Light movement:
Move forward: Mouse up
Move backward: Mouse down
Move right: Mouse right
Move left: Mouse left
Move up: Left button + mouse down
Move down: Left button + mouse up