I see clearly now... The nutcracker you bought the other day, is alive. And it has magic power of some sort. It did something with the house. It looks bigger now. Or maybe you bacame smaller? What's going on here? Wait, did you see them? Those plastic soldier figures are also alive! They just marched through the room. They were in a big hurry. Let's follow them and see what else happened here during the night. Maybe, they will help you turn everything back to normal. Oh... The door is locked. They key must be here somewhere. Or you could just look for the hole where the soldiers went through.
Walkthrough for Christmas Doors House