What is the control to enter a door?
K. It's also displayed if you stand in front of a door you can enter.
Everyday a new door opens up.
The first door on December 1st, the second on December
2nd ... until December 24th.
So if it's already December for you, head to the door with the number 1 and have fun :)
Oh I see it now. I tried playing on November 30th.