Bonus fruit: On level 1, shoot the first two monsters with bubbles,
then fill the screen with bubbles. Then, bubble and burst the
third and final monster. All bubbles still on the screen will
turn into fruit.
Continue game play: After the last life is lost, hold Fire to regain
a new set of lives with a score of zero.
Level skip: Press [F2] during game play to advance to the
next level, [F3] to advance six levels, or [F4]
to advance eleven levels.
