Alternative Sound Test Code
Press and hold A amp B and press Reset If done right the sound test menu will appear
Change the music
In level 10 after killing the boss press and hold Select When your ship moves again the music will be different After beating another boss the music will return to normal unless you hold select again
Debug Mode
This code is strange The debug mode is only available in the USA version but you have to use the Family Computer Keyboard which only came out in Japan To enable the Debug Mode Reset the NES 9 times On the title screen use the keyboard to type COMPILE and press Enter If done right a sound should be heard Now during the game you can pause it and press Select on controller 1 to change weapons Clear Clr on the Keyboard to get 254 lives and Insert Ins or Delete Del to warp back and forth between levels
Different Game Over Music
Lose all your lives and right before the words quotGame Overquot appear press and hold Select If done right the game over music will be different
Hidden message
Wait until the fairy stops moving during the ending sequence Then press A B on controllers one and two
Wormhole to next level
You can also change the music by holding Select after your last ship is destroyed