If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
No matter what tractor you will choose your task will be to have fun driving through hilly landscape near some village. Reach maximum speed so those animals will not have any chanse to run away from you. Destory the harvest, mean tricks on village people or just try to reach the end of the road. Anyway... Have fun!
Arrow keys to drive.