You're not saying that time doesn't matter, are you? Because I read that it did in one of the earlier posts, and time is of course in the score sheet at the end.
So are the factors just (1) time and (2) staying alive? If so, then I assume saving the game has no impact. I like to save it just before anything difficult, or sometimes I just get tired! It takes about four hours for me to play the game all the way through.
I'm sorry to hear that you won't be doing any more Star Wars games. It's a shame. I think it comes down to the fact that most gamers don't want to bother with a game they have to think about. They just want to sit down and start shooting or slashing bad guys / droids.