Donut Stack Jam

Sort the donuts into boxes of their color. You have several donuts of different colors on one tray. On top you have a line of colorful boxes. Your task is to sort the donuts into boxes. At the same time, you have a dock with 5 cages for trays. If you overfill the dock, you will lose. You will encounter a large number of different levels. Be careful not to overfill the dock!