If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
I bet you didn't realise that down in the countryside the farm animals are a little special! They are car loving racing partying wild beasts and today they are trying to make their way to the next party! Give them a hand well you before the farmer gets back, besides I have a feeling it will be a heap of fun! Enjoy!