Don't waste time watching long ads at the end of each stage

Don't waste time watching long ads at the end of each stage; just take the basic money. When you can't clear a stage, watching an ad gives you 300 gold, which is more than the triple or quintuple you get at the end of a stage. If you can't clear a stage, you can spend 900 gold to clear the tray and place it on the top row. At this point, try to clear the plates below as much as possible, because if the plates on the top row go out, they'll return to the bottom and take up space again.