Invincibility – At the “Press Start” screen press A, A, UP, B, B, DOWN, A, B, START
View Ending / Credits – At the “Press Start” screen press A, A, UP, B, B, DOWN, A, B, B, START
Stage Select – At the “Press Start” screen press LEFT UP RIGHT DOWN UP RIGHT LEFT DOWN then press the following for the stage you want:
Stage 2: UP
Stage 3: LEFT
Stage 4: DOWN
Stage 5: RIGHT
Stage 6: SELECT
Stage 7: B