If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This game is very much like The Waitress or Diner Dash. You are a waiter in a restaurant. Clients come in. You must sit them at a vacant table, bring them a menu, take the order and bring this order to them. To sit a client drag him to the table you prefer. To take an order or bring a menu, click on a balloon that appears next to the client. After a while the dish the client ordered will appear on the chef's table. Click on the dish to take it and go to the client's table to bring the order to the client.