Really nice concept and design. I would say make this into a web game and polish the mechanics a bit more and it's perfect. 

The spawn rates seemed a bit high and the screen shake when there are too many friends is a little much.

Other than that, best game in the jam (in my opinion) :)

A cool and nice game to play, I like the art-style and the choice of music used for the game.

There should been a prompt for buttons to pickup boxes too.
Thought the friendly grinches would help me transport the boxes instead when I was starting out, took me a short while to figure out carrying the boxes to the tree myself.