Ho ho ho. Yes, it's a little early for Santa, but he's here anyway. Well, he is in Bridge Constructor now, at least.
In the game's winter update, out today, you have to help Santa safely deliver his presents by building a smooth bridge for his sleigh to cross.
Don't manage that and, yep, you'll ruin Christmas, you dope.
There are a bunch of levels containing Santa in the winter world "Snowy Hills" and they'll be available to try out until springtime.