I am not sure what happened...don't think I had an event, but when I checked on my Villagers today...
- all puzzles reset to incomplete - lab, cave, bath, trees all reset to start
- all villagers/food/tech points still there - 32/4850/248975
- all technologies fully researched, nature at level 3
- awards still there
- all huts incomplete
- graveyard full
- all collections still there - 9/12, 10/12, 10/12, 12/12
- all keys reset

Left the game running overnight on slow

WHAT GIVES????
In any case...I am done. This version takes too long to make progress and I don't have the patience or motivation to re-do everything.

We are sorry that is happening to people's games. That issue was discovered after the game was released, and we are working on it. You can see more complete explanations of what we know about the bug here.