Rydian: Thanks, I totally didn't notice that it crashes the intro sequence, I had turned the code on past that point.
Anyway, I decided to make more, including more jumping codes that shouldn't crash the game (hopefully).
TAUTOVIK - Infinite Multi Jump (like famous skywalker code on smb3)
XXEVSLOP - Higher Jump
IEUTXUNY - Even Higher Jump
IEXTOUNY - Even Higher Jump
PAENIIAA - Enemies (including bosses) die instantly (NOTE: This code makes all enemies get shot until they die. On screens with enemies that don't die from regular shots, you'll here the blocking sound effect being played constantly)
TUVTKSGU - Turbo Fire
OXVTSIVV - Turbo Fire
(EDIT: I copied the wrong code for turbo fire it is fixed now)
(EDIT2: WTF!! Apparently I had the wrong code for "even higher jump" also. fixed now)