Normally on an island you go to the same levels each time you play. To go to the Different levels on the island, get a certain egg in the bonus stage after each level. On island 1 Get the 4th egg that appears for the Different levels. On island 2 get the 3rd egg. On island 3 get the 5th egg and on island 4 get the 7th egg. These are the only islands that I know the different level egg for. Just grab the right egg and the guy will go to a different part of the island so the next level will be different!

Locate the fifth skull in the very first cave in the game. Once you've pass it, jump around to find a new hidden room. You'll find a bee. At any Game Over screen from now on, hold LEFT. Then press START. You will continue regularly with all the items you had before.

To start off on any island, press Right, Left, Right, Left, A, B, A + B at the title screen

When you're at the title screen, press the following buttons in this order:

Right, Left, Right, Left, A, B, A, B

You will then be able to choose which Island you want to play on in this new ''World Select'' menu. Use A to confirm.