Good Game, a little repetitive for me though...
Maybe it's the difficulty (which wasn't as bad as everybody lets on) that requires you to stock up on red orbs, I guess you can only defeat an enemy or destory a jukebox so many times before you say to yourself "alright time to move on" only to find yourself with not enough holy water or green spheres to actually defeat the boss, so back you go to collect more red orbs.
I found myself bored with the first in the series and gave up playing at about mission 17, I didn't even bother with the second and had the same problem with the third, at around mission 17 I became bored and had to force myself to finish.
But that's my opinion I know alot of people out there love this game and I did too when I first started playing but it lost it's replayability after about 15 hrs. peace :)