Carnival
Holding down the fire button as you power the system on causes a dot
to appear in the top row of targets. Shooting the dot before it
leaves the screen (it then turns into a duck) will reveal the
programmer's name. ("Programmed by S. Kitchen" S=Steve)
Fry the game until the screen is blank but for one duck may produce
the following results: pipes stay the same color, invisible pipes,
high game speed, and the dot (see above)