Thank you! Some Black Mirror episodes were indeed a source of inspiration for this story. There are no substaintial differences between playtroughs, exept small one at the very start (but it's hard to spot). Yeah, the bug was preveously reported and I made adjustment to description page about it - in short, if you want to see both variations of ending it's best to save before it than to play second playtrough, if you want to explore the game again it is best to start a new one from menu than to play second playtrough.