NOTE: None of the material on this page has been confirmed by The Sega Notebook.
Level Select
Press the pause button 12 times during the title screen. Then press up
and left on control pad #2 and buttons 1 and 2 also. Mary's sound test
screen will appear. Above her head, in the top left-hand corner are the
level numbers.
Bonus Round
In level 4, go to the underworld and destroy the snail in the center of
the screen on the block. A warp door appears on the left side of the
screen to take you to the bonus round.
Locations of Missiles
First Level
When you get to the boss, let him hit you once so you drop your jet pack
(if you have one). Crawl under the platform that the boss lands on and
start firing. After a few shots, a missile will appear that will
increase your power level.
Second Level: Surface
Jump up and shoot the first Mabuck creature you see a few times. A
missile will appear that makes aliens seem harmless.
Second Level: Under World
Beside the StarPower you'll find a missile that increases your power
level.
Third Level: Surface
When you get to the place that separates you from the boss creature,
shoot at the lowest cluster of balls that juts out of the wall. Note
that they will not disappear. Keep firing at them and a missile will
appear that makes the aliens seem harmless.
Third Level: Under World
After crossing the first chasm, shoot the ChimeChime creature on the
platform, get the Point-Ball and fly over the platform. A missile will
appear that increases your power level. Drop your jet pack and crawl to
get the missile.
Fourth Level: Surface
Destroy the Abukutsu creatures and go to the right of the platform that
the Hodate creature is on. Start shooting at the platform. A missile
will appear that will increase your power level.
Sixth Level: Surface
Go past the Slyme and Amappo creatures, grab the jet pack, and keep
flying forward. Things that look like screws with nuts on them will
appear in the top half of the screen. Shoot each one of them until you
find one that your bullets will not go through. Keep shooting that one
until a missile appears. This missile will increase your power level.