When racing don't hold the control stick or you'll go in circles. Just tap it the way you want to move. Sometimes you have to hold it a little longer than tapping.
When doing games such as the ones you have to redeem your points, don't kep returning to your base every five seconds. Wait till there's about ten seconds left then you go redeem them. You get more because you don't waste time going back.
Go to password and type this in Q7BRBY
Reach Chapter Five with Z23CHC as your password.