Astal Energy Refill
While playing, pause the game and press Down, R, Up, L, X, A, Y, B, Z, C, Right, Left.
Invincibility
While playing, pause the game and press Up, Y, Left, A, Down, B, Right, C.
Quick Death
Press L, A, R, C, B.
Secret Mode
At the Options screen, press Left, Right, Left, Right, Up, Down, L, R, Start. A new entry called Secret Mode will appear which you can use to increase the number of lives to 99.
Level Select
First enable the code above, Secret Mode, then return to the Title screen. While the words "Game Start" and "Options" appear, press Up, Down, Left, Right, L, R, A, Y, C, Z, B, X. Stage Select entry will appear on the main menu.
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