Passage is meant to be a memento mori game. It presents an entire life, from young adulthood through old age and death, in the span of five minutes. Of course, it’s a game, not a painting or a film, so the choices that you make as the player are crucial. There’s no “right” way to play Passage, just as there’s no right way to interpret it.
What could be more emotional than one’s own death? For more on the game and Rohrer see The Video-Game Programmer Saving Our 21st-Century Souls from Esquire.