If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
There is no tip?!???! Waiter is angry because there is no tip for him. Help him to make big damage on the restaurant. You will do that if you throw plates to bring down the bottles and anything you want. More bottles and plates down - more points for you - bigger damage for the restaurant. Play the game with your mouse.