It’s not as spectacular as Violet, but I’ve just enjoyed playing Grief, another IF Comp 2008 entry. Download the .z8 file (which you can play in Windows Frotz or your favourite Z-Machine).
Play it a few times to see a few of the different endings: if only you could have done things differently… but perhaps things aren’t inevitable. There’s over a half-dozen different endings: wait until you start spotting the pattern, then – if you haven’t found it by yourself – type WALKTHRU to see a list of achievable endings so that you can begin to understand the truth of the matter… and when you do so, remember the first scene…
But if you only play one IF this year, make it Violet. =o)