It's a charming game, but it just needs a different save mechanic. I played it through twice, and both times was unable to befriend one of the lab members (the first time I didn't talk to somebody early enough, and the second time I forgot to talk to them again after completing the simulation). There's no way to go back and change it, and there's no way I'm going to play it a third time because the movement of your character is way too slow for any of the errands you run to be any sort of fun.