Create a new garden and when asked to name your garden, name it Piñata People. You'll start the garden you named, but you will be able to view the credits on the main menu (the option farthest to the left). When you view the credits you have to break open the Piñatas to see them. Before you break them open, you might want to destroy the debris to unlock the hidden accessories. This mode is completed after you break all the Piñatas. You will also unlock The Wishing Well when you complete this mode.