Hold the following buttons at the title screen and press the following then the start button to skip to that level.

Effect	Code
World 2 Paris	Left + Up + 1 + 2.
World 3 Alps	Down + Left + 1 + 2.
World 4 Rome	Down + Right + 1 + 2.
World 5 Cairo	Up + Right + 1 + 2.
World 6 Jungle	Right + 2.