Liza Daly has come up with quite a few ways of presenting stories in the past, including complex parser games, the precursor-to-Twine game First Draft of the Revolution (in tandem with Emily Short), and the Windrift engine.
This game builds on that earlier material. It is very short, finishable in 5 minutes (unless I missed something major!).
Basically, there is a sequence of choices in the story, each of which can be revisited at any time. There is a bit of hysteresis, a term Emily Short has used before to describe how doing and undoing choices doesn't just put you back where you started, but has lingering effects.