This is how it's supposed to work: The top flippers should have been "zipper flippers." They're supposed to close for a timed period when you hit any of the top drop targets. That's when the annoying background sound begins. If the player takes too much time to hit the next target, or if the ball exits the upper area via the two side lanes, the game is supposed to reopen the flipper gap, laugh at you and go back to its normal background sounds. In this video, the player hits a drop target and the game responds by switching to the more annoying background and trying to close the flippers -- but the flips never close, so the sound board stays on that annoying background.
Pinball arcade sucks and will never have it but you can play it on pinmame and it plays very well and you can win credits instead of farsights stupid free play and restrictions bull shit!
"Light Gorgons." When the light turns green, the five rollover button lights "zip" up the shooter lane. For each lit rollover you hit, one light on the center spinner lights up, increasing its value for that ball.