Click on your mouse to choose the arrow keys and put them in the right place on the green area. So the milk cow can get across from those obstacles according to your arrow. Press the 'GO' button to let the cow run. You can click on the 'STOP' button to restart the current level. Advance to the next level by helping the milk cow reach the destination. If you don't understand the purpose of some level you can let the milk cow run in advance. After you have pass 2 levels there are two cows on the screen. One is to help you to complete some machinery; the other is your controlled cow. Have fun!