At the options menu, enter the opposite of the level select code: C, Up, B, Up, A, Up, C, B, Down, C, A, Down, B, A, Down. Complete the code correctly and the credits will start immedeately.
First, Access the Options from the title screen. On the Options Menu, take controller one and press these buttons in this order: A, DOWN, B, DOWN, C, DOWN, A, B, UP, A, C, UP, B, C, UP. If you did it correctly, you will hear a special sound. Go back to the title screen and hold button A and press START for Level 2, B and press START for Level 3, and C and press START to begin on level 4.
In Level three, The Machine, there is a moving platform where you start which takes you to either side of the area. If you stand on the platform and press up or down, the platform will stop, allowing you to get a good look around or plan your jump carefully.