Secret alternative third areas
While playing a "Target Shooting" level, keep on the lookout for
scarecrows. Once one is found, shoot the torso of the scarecrow 8
times. The head will inflate, allowing you to shoot it for 1000
points. Do this with the two scarecrows in the level (the second one
will only appear if the first has already been shot), and instead of
taking you to the default third area, the game will bring you to an
alternative area, with more gold targets.