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)