Thanks for playing! In answer to your questions:
1: There wasn't supposed to be any way of playing through a second time - I wanted the game to reflect the fact that players would not realistically be invited to this particular tea party ever again - but I'm aware that people have worked out ways to have another go. I don't want to offer any clues myself, but I will say that it's really not that hard.
2: No, there's no shocking twist. The description of the game is deliberately misleading, but I can promise the individual choices are 100% honest about what's going to happen: there's never any occasion where you select "accept another cup of tea" and suddenly zombies burst out of the pantry.