Play time estimation for chapter 1 (Patreon)

I would like to double check the play time estimation I usually use for the game with the player base, patron or not.

When someone asks me how long the game is, I currently give 10-14h as response.

How much time did you need to beat chapter 1, including beating the Festival and opening the Main Chamber? But disregarding additional playthroughs.

Poll options are in hours.