Extra Points:
This is not as much of a cheat as it is a hint. go to the waterworld show and watch it then exit. every time you do this you get 100 points. keep repeating until you have as many points as needed

Get Attraction Mode:
First get all 8 stamps and then talk to Woody Woodpecker near the globe. When talking to him pick the magic show. Now when the credits finish go back to the title screen and see a option for attraction mode

Rapid fire in Wild,Wild,wild West:
This one is really very easy. While playing Wild West, Just alternate L & R quickly. You'll have those targets down before he does!!!