Blue Windows: Chose Care from the main menu, then select the Secret tab and select Codes, then enter 39356FWWBJ as a code.
Bigger shop: When you are in your shops and you are helping customers, if a princess comes in it indicates that your shop will probably get bigger unless it has already reached its peak of four upgrades
Coffee Jelly: Chosse CAare from the main menu, then select the Secret tab and select Codes, then enter A7TJJ7Z882 as a code.
Melon Bread: Chosse CAare from the main menu, then select the Secret tab and select Codes, then enter 3427JF3TTHG as a code.