At the main menu, press Up(2), Down(2), X(2), Left, Right, Left, Right, X, Triangle, X, Triangle. If you entered the code correctly, the menu will turn red. Now press Right to select a level.
At the title screen, hold L1 + L2 + R1 + R2 and press Up or Down to control the speed of the clouds.
Beat the game (not including extras) without using any continues to enter Super mode. In this mode, you can jump six instead of three times in a row. When landing on enemies, press Triangle to fall faster and do more damage. Press L1 or L2 will to run faster and jump farther.
After you beat the game, go to the stage select screen. Then, scroll through all the levels until the word "Extra" appears. Now restart the game to be able to jump five instead of three times in a row.
After you beat the game, the levels may be played again with added, moved, or missing objects. Each level will also have a time limit.
If you were looking for Jumping Flash! for PSX cheats, then you might also want cheats for: