If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Serve the customers well and earn maximum score. Click with your mouse to take an order, clean the table, place an order, get food as well as dispose the wastes. You can click the back door to call the worker to clean the dishes, refill coffee cups, refill drinks and to empty the recycle bin. You can only take an order after cleaning the table. Don't make the customers wait too long or they will walk out making you loose a life.