Hold Select and alternately press Left and Right repeatedly until "Sound 01" appears.
30 Continues At the title screen, hold Select and press Run until the phrase "Area 1"
Area 0, 30 continues Enable the Sound Test cheat. Press I, II, Select 22 times. Then hold Select
and Run until the game starts.
Sound Test Hold Select and alternately press Left and Right repeatedly until
"Sound 01" appears.
View Ending Hold Right, and keep pressing Run quickly at the title screen.
Enable Sound Test cheat. Press I, II, than keep pressing Select until the debug screen appears.
Extra Lives, Bombs, Power Hold I and II and press Start to begin gampleay with 10 lives and 10 bomb
Half Game with lots of Satellites Enter 83
Invincibility Enter 77, then press Up, Down before leaving debug screen.
Level Select Enter 00 - 09