Beat the game on HARD with NINJA 5 on your first go. The levels are re-used a lot so once you learn it, the only thing different are nemey patterns.. even then the same route works plenty of times. For NINJA 5 on hard.. you only really need to get about 5 or 6 SK's *Max points/Wait for the heart beat* and then SK the Main Target *Once again wait for the beat*. 900 + points is needed for 5 so it isn't to hard. I have no idea if this works on easier settings since I started on hard right away.