If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Make Pizzas to the customers as quickly as possible to earn the biggest money. The ingredients starting with pizza base will be highlighted. Click on them in that order, and then click on the oven. Click on the pizza again and give it to the customers. The ingredients will vary for the next pizza. The number of pizzas to be will increase in the subsequent levels, and limit will also increase.
This game is played with mouse only.