The objective of the game is to collect the most Happy Points at the end of the dynamic board game. (ign.com)
Then you'll move around the «board», which in this case is an Animal Crossing town, and collect Happy Points to win the game. (animalcrossingworld.com)
In - game outfits can unlock for your characters too by saving Happy Points to your amiibo figures. (animalcrossingworld.com)