Throughout all thirty-two levels, Mario exists in front of what in gaming parlance is called “an invisible wall,” which doesn’t allow him to go backward. There is no turning back, only going forward—for Mario and Luigi, for me, and for you. Life only scrolls in one direction, which is the direction of time, and no matter how far we might manage to go, that invisible wall will always be just behind us, cutting us off from the past, compelling us on into the unknown.
