The person in charge of making the hamburgers has fallen asleep. You are his best friend and you'll help him with his work so that he doesn't get fired. You should attend to the orders of your clients. Make the right hamburgers and your friend will appreciate it.
The customers' orders will appear above them; the ingredients are at the top left. Click on the ingredient which your customer requests; when you have the order ready you should give it to the person. If you make all the orders correctly, you'll get points and move on to the next level. Don't make mistakes or your points will reduce and you'll lose. Your time is limited.