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Customers pay for items, and the higher their happiness, the more they pay. Combo bonus points can be earned by checking out more than one customer at a time, by cleaning more than one table in a row, and by serving more than one customer in a row (without doing anything in between).
You will earn an "all clean" bonus if all the tables are cleaned before the last customer is checked out.
If you pick up an item you don't need, you can delete it from your tray by clicking on it on your tray.
There are three difficulty options, located under setting in the menu.
Challenges occur on each level. You do not need to complete the challenges to win the story levels, but will gain diamonds if you do.
Tip: If you find you can't achieve three stars (mugs) when doing the challenge, play the level twice. Once to win the challenge, and a second time ignoring the challenge and just playing to earn three mugs.
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