There have been many games in the history of IF that have utilized the journal as a storytelling device, and many of those have had the player discover the journal pages out of order to add intrigue. In Passages, the entire story is reading a journal out of order, with the raison d'etre being a distortion of the space time continuum.
The time and space mechanics take a backseat here to the relationship described in the journal, primarily all of the author's regrets with regard to said relationship. It's a cool concept and I think it was structured fairly well. However, I think it would have made more of an impact if we had seen more journal entries from happier times to give the despair more weight. Mainly, I wish the protagonist wasn't such an insufferable twit; I had no emotions to spare for this person. To be fair, the PC reminds me of myself when I was fifteen, so your mileage may vary.