That Pac Man isn't eating pellets, he's eating burritos, but because if you look at a burrito face on, it kinda looks round, and the graphics at the time were so limited...
Pac Man is secretly shilling Mucho Burrito (or whatever your local Mexican fast food joint of choice is.)
But that means Pac-Man is eating the burritos edge-on which is clearly insane, since he eata them in one chomp.. You might be onto something, but i don't think burrito is the answer.