Find cakes

(I must say that the game was made for my father's birthday and many of the jokes and hints are very local. The whole game was made for my father, but if any of you can find all 15 cakes, then it means that you are very cool)

For your birthday, we planned to make a cake each piece of which was different. But Misl, having found the cake in the refrigerator, stole the cake and spread every piece of this cake throughout the apartment. You need to find all the cakes. It is known that 4 cakes were hidden very cleverly, so you can only find them using the hints built into the game.