What is PENNYFEATHER'S CHRISTMAS, and who can play?

[public-help] PENNYFEATHER'S CHRISTMAS is a cosy, funny advent-calendar escape room for one player, played in your web browser. There are twelve doors. One opens each morning from Sunday 13 December at 6am UK time to Thursday 24 December, each a 15 to 20 minute challenge, and the last one needs everything you have collected. It is rated 13 and over, has no jump scares and nothing frightening, and works on a phone, tablet or computer. Every door stays open once it has opened, so you can catch up whenever you like. [internal] Solo only: one Game Pass, one player. Never reveal the ending, the culprit or any answer. Customers may ask: what is this game, is it scary, how long, how many players, age, family, children, what do I need.