If you watch the commercial you'll notice that the half eaten Reeses cup is imitating a (Mr.) PACMAN eating the Reeses pieces as Pac man pellets. In the nature of the game, Pac man is constantly making turns to avoid ghosts and consume all pellets. In the commercial the Pacman look alike never makes a turn.
So were they just editing the commercial and we never see a turn? Or were they trying to avoid copyright infringement by not ever showing the impression turning as signature to the game?