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.
