When the screen says {Press Fire for Options} type in any of the following:
"BUMBLEBEE"--Skip stages (press 'RETURN' to skip)
"CREAMOLA"-------------------------------10 lives
"VISION"---------------------------------20 lives
"TOUGHGUY"--------------------------Invincibility
"OLDENEMY"-------------------------Unlimited time
"ALCENTO"----------------------99 items collected
"KICKASS"-------------------Unlimited smart bombs
"NAPOLEON"----------------Bonus level every stage
"MARROBONE"-----Stops the ball on the bonus level
"SESAME"-----------------------Start on level two
"RONSON"---------------------Start on level three
"FUNKYTUT"--------------------Start on level four
"HISSTERIA"-------------------Start on level five
"7SLURP"-----------------------Start on level six
"PLUNGER"--------------------Start on level seven
"WARPMODE"-------------------------------untested