On any stage Pause the game then press: A, B(2), A(2), B(2), A.
Go to the option screen and press A,C,A,C,A,C,A,C,B,B,B,B. You can turn on Cheat mode, Level Select, Freeze mode and Map View.
If you turn around from the start you will find 4 apples. If you go past the tree on your right and then go back to these apples, you will find an extra life waiting in the middle of them
You will come accross a pillar which has a picture of Goofy on, if you jump while behind it, you will fly upwards into a secret shop.
In the Desert level, you will come across a washing line with a pair of Mickey Mouse ears hanging up. If you position Aladdin in the correct spot, he will move slightly forward if you aren't pressing anything and his head will appear to be wearing the hat. This causes a life to appear.