- The duck button is not very useful. It prevents you from getting your head split open by a high ball, but a better option is to swing with the left button and hit the ball off to the left for a few points.
- When a slow ball bounces to your left and then curves off sharply to your right, you can hit it with the left button, timed fairly late.
- You can practice against spin bowling by using the password "spin"
There is also another version, an Australian stick cricket game here. (Passwords: stinky, kempy, jg, pete, sofa.)
Learn more about cricket at Wikipedia if you don't know the rules.