Here the spectator is invited to take part in the artwork, asking him to "play" with it by performing the action that will give the answer to the question:
Will you hit the duck or will it fly away?
Keyboard control:
G - switch between auto/game mode S - sound on/off Space - shoot (game mode on)
Remember, you only have one shot. If you miss the duck, you have to wait for the next one to show up before you can shoot again.