License Screen Codes
At the license screen, enter any of these button sequences in order to trigger their effects. Note that these sequences are numbered - you must enter them in this order. For example, you cannot enter sequence (2) to get only its effects; you must enter (1) and then (2) and you obtain both effects.
Effect Code (1) - When paused, you can press Select to play the game frame-by-frame (1 frame = 1/60 second). You can press A+B to enable Stage Select. (1) - B, A, Up, Down, Right, Down, A (2) - Enables invulnerability and infinite lives. (2) - Up, Down, A, B, Down (3) - Effect unknown (3) - B (x28), A
At the title screen, hover the cursor over "Start", hold Up, and then press A or Start to enable the game's sound test.
Easy/Hard Level Passwords
From the Main Menu, choose Options then Password and enter one of the following:
Effect Password Easy Stage 02 41253 Easy Stage 04 23514 Easy Stage 06 52143 Easy Stage 08 34125 Easy Stage 10 24351 Easy Stage 12 41352 Easy Stage 14 15432 Hard Stage 02 21345 Hard Stage 04 51243 Hard Stage 06 25134 Hard Stage 08 35412 Hard Stage 10 43215 Hard Stage 12 43152 Hard Stage 14 21354
Medium Level Passwords
Effect Password Medium Stage 02 14235 Medium Stage 04 53421 Medium Stage 06 41532 Medium Stage 08 54321 Medium Stage 10 31245 Medium Stage 12 31542 Medium Stage 14 35124
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You can submit a problem report for any non-working or fake code in the lists above.