thank you! from the main menu (the street with the buildings) you can walk downwards off the screen to enter exploration mode. then by completing certain goals (eg, play 100 minigames, eat 3 x 5 star mealmates, etc) you can progress through the world and find hidden chests. once you find some chests you can go to the locksmith (in main menu) and pay him to open them for you, which will unlock goodies.