Why are all of the bonus symbols food-related except for the galaxian, the bell, and the key?
The galaxian was added as a nod to the Namco space-shooter title, Galaxian, which was under development at the same time as Pac-Man. No one knows why Toru Iwatani chose a bell and a key for the final two bonus symbols. It has been theorized the bell may actually be some sort of food like an Asian cashew or even a blancmange dessert, which would make it consistent with the food theme. The bell at least has the possibility of being something else—no one has any theories on the key being anything but … well … a key.
