GUNGAN and JAR JAR
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While in normal play, an image of seaweed and bubbles appears on the display
around the place the bumpers are located. During normal play only, getting the
ball to the jet bumpers awards one letter in GUNGAN. Usually you only get one
letter per trip to the bumpers, but if the ball somehow doesn't trip any bumper
for a couple of seconds, the game will assume the ball left and returned and
will award an additional letter. Spelling GUNGAN replaces the seaweed with Jar
Jar Binks, and now hitting the bumpers causes him to feel arbitrary, sourceless
pain and suffering. This is basically Super Jets (though I haven't noticed the
scoring). Furthermore, you'll notice that now the "Star Wars" virtual spinner
over the right ramp has changed appearance. Hitting that ramp now awards
letters in JAR JAR. I don't know what this is for; does anyone know the purpose
for this?

From: http://pinball.org/rules/starwarsepisodei.txt

That covers the Gungan question anyway.