If you would like to Master every stage, you will have to
do the following: save all of the lives of the Innocents,
find every one of the buried Treasure Chests (Secret Chests),
collect every item in the stage (Koins, Diamonds, Armor. . .
Everything, basically), and defeat every enemy in the
stage (including those Evil Bunnies. ) If an enemy falls
off of the stage, it is counted as a kill. If you collect
an item and die, you will have still collected the item.
You will be rewarded with Art Galleries of concept images.
On Level 9, Down with the Ship, you have three minutes
to destroy six reactors. Using the Drill Attack, you can
destroy a reactor with three hits. Destroy five reactors,
then spend the rest of your time fighting enemies.
You can earn lots of money destroying enemies. When time
is almost up, destroy the final reactor. Go back to Level
2. Purchase power-ups and continues from the merchant then
save and quit the game. Load your save, return to Level 9
and repeat the tactic. You can do this as many times as you
like and earn oodles of cash in the process.