Continue game from last stage:
After collecting the Hudson Bee from World 1, hold LEFT START after game ends to continue playing from the last stage.

Stage select:
At the title screen, after Higgins has been hit by a coconut, press RIGHT, LEFT, RIGHT, A, B, A to access the “World Select” screen.

Extra Items:
Enter “0894” as a password for 99 of each item to get an extra item.