Cheat menu
Hold down A + B + Select when turning on the console, shortly after, press Right, Left, Up, Down. Here you can choose the stage and level, and a music test.
Level Passwords
DOXNF - You will go to level 5.
EIUZO - You will go to level 10.
LEIQX - You will go to level 3.
RGVDE - You will go to level 7.
TLKSS - You will go to level 2.
TOCEG - You will go to level 9.
XOHPW - You will go to level 6.
YGUKV - You will go to level 8.
YOTAJ - You will go to level 4.