Lettres Volées ("Stolen Letters") is the kind of game you can't write much about without giving spoilers. Let's just say it's a game in which you're not moving in space but in time. That's very rare in IF, despite the fact that time tracking is well-supported by Inform, at the very least.
Essentially, we're talking about a one-room game where descriptions change constantly. As time passes, you remember more relevant information about the surrounding objects, and you're offered more things to do with them. As a nice touch, the location itself is only described indirectly, through said objects. Artistically speaking, this works very well. Lettres volées does a great job of setting a mood and making an indirectly-discovered world come to life.
On the minus side, what I'm supposed to do in the game is despicable. I had to turn to the solution to even realize what was expected of me, and I still don't understand why I should be interested in doing it. And what's with all the waiting? I know there's a reason for it, but the third or fourth time it's no longer funny. Either I'm not on the author's wavelength, or else Lettres... needs a lot more clues. And I mean in-game, not in the hint system!
I could not reach the end in time for the voting deadline, (or afterwards, for that matter) but I hope to return to it someday, if only to see what other surprises the game has in store.
While the English interactive fiction community regards long, elaborate works as an ideal, French authors seem to prefer small but well-made games (Ekphrasis being the exception that strengthens the rule). Brume is an escape-the-locked-room puzzle, very simple, but almost flawless. Except for a couple of unimplemented objects and an overwrought blurb, I have no complaint.
The game is made to convey a particular mood, and it does so with a carefully designed environment and short, well-written descriptions. The timed mood messages and occasional sudden deaths (they're undoable...) help, too. The puzzles are very basic, which is just the way I like them, but since the game is so small, more red herrings would not have been out of place. The author has clearly mastered the basics of text adventure authoring. I recommend just a little more ambition next time.