For being such a SHORT demo, the time speed needs to be a lot slower. Like you said, you can finish the demo very fast in about 30 interactions and you're unlikely to bother doing it again cause you barely saw anything. Replayability is a moot point because of the long intro makes you forget what you did last time. Slowing the time advance would let people explore options a bit more before the 1 day is over - and then they could decide if the game has anything that interests them.