Seems like I am softlocked. There are two quests that do not trigger ("The villagers present" and "Surprise 1"). No new quests appear, no quest events happen.
Is there anything special that should be done on the VIP train car? I am Always detected ("alarm, outsider in the car")
Edit: you can move faster with shift! That was easy
recreating 3d models that come close to the original is super hard. Writing story is easy (at least for some people), implementing it into a game is also easy (for some people), but matching 3d models or a 2d character style is very hard even if you are good.