I first played ONE CHANCE 2-3 years ago, but it seems that the version I tried had a bug which prevented the best possible outcome.
However, in this version, undertaking the exact same course of actions does lead to what seems to be the best possible outcome (of having at least 2 humans surviving beyond 6 days).
Another bug common to both versions is how the child may sometimes appear twice in the same scene, as if she suddenly has an identical twin.
By the way, the version hosted at your game website does not seem to work. It merely launches with a blank white screen, with music playing in the background.