So, everyone likes a fresh start .... The world has no trash, everybody running around with no fear of each other and so on.
Well, I think it's too short .... A matter of days, if not hours.
Consider to extend this period with more complex craftings and temporary buildings on the theme of a primitive Life.
No concrete suggestions rn.... But you get the idea .... If someone has ideas on how to make It real feel free to comment below