Suggestion: Snowmen, snow angels and snowballs+

Add an %action menu action of making snow angels and snowmen for a little joy increase. Add snowballs and make throwing them either at zombies or anything at all joyful.

Also, icicles as piercing weapons!

And also, special winter-zombies who freeze plants in their wake dead as well as the player if he’s not wearing warm enough clothing.

By 2049, global warming takes these simple joys away from us!

Don’t worry, the nuclear winter will cancel it out.