Beat the game on
Normal to get a good
ending (better than
Easy), and a new
title screen. Beat
the game on Hard
with a Regular
ranking to get the
best possible
ending.
Complete all the
trial missions for a
particular level but
do not do the next
level (that will
reset the trial
mission). When you
complete the level 5
mission you can
gather up a large
number of points
plus you get bonus
points.
Simply repeat the
lvl 5 mission as
many times as you
please in order to
gain both the points
gained in the
mission AND the
bonus points.
For example, Mission
7, Trial mission 5
you can gain about
250,000 points per
run. 120,000 of that
game as the bonus,
while the rest was
gathered during the
run.