If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Irene has just opened a lovely cafe and there are many delicious food on the menu. She needs to serve fast in order to please the customers. Help her operate the machines accurately and on time. Once the related food is under the machine, you should click on the machine to make it work. Try to reach the daily goal and buy upgrades to serve faster!