The Witch's Yarn is a graphic adventure with a difference. Rather than being an exercise in puzzle-based problem solving, it's more of an interactive drama--your choices in terms of actions and exposition affect the reactions of the other characters, and the direction of the story.
In addition, you choose each scene what characters to introduce, and this also determines what conflicts arise and what happens. It's possible to get yourself into an impossible situation as a result--but you can "rewind" the story to a prior moment, and proceed from there, making other choices.
Depending on how you look at it, The Witch's Yarn may not be a game--although you are striving to achieve a satisfying conclusion to the story of Wednesday, the protagonist, it doesn't have the sort of quantification or clearcut victory conditions of most games. Contrariwise, it's quite accessible as a novel form of story to those who might be keen on playing a "game" as such...
Quite unusual, and worth a look...
It was a 2006 Independent Games Festival finalist, btw.
