This game is so good it hurts.
Really really good use of the medium. I have attempted to tell so many people about this game that my friends are bored. This is the memory of playing that I pull out when I am trying to explain to a non-IF player what the genre is all about and how exciting and mind-bending it can be.
Not really a spoiler, but marked for the especially sensitive:
(Spoiler - click to show)There is a part in the game in which I realized that what I was doing as the PC (in a flashback) was not what I had really done.
It created this weird moment when I realized that the author and I had entered into a strange conspiracy to tell the computer lies. In other words, the game state was not merely contained within some data structure in software, but existed in the mind of the player and the author. Weird.