I found I was best able to digest the game by spending some alone time to just casually go through it (a little easier when you own one), and then reading over the rule sheet here http://tiltforums.com/t/star-wars-rulesheet-0-83/2812
The rules sheet on tilt forums is a little older, but the core objectives and goals still apply. Tweaks to the game have been more adjustments to sounds or timers or little tweaks to minor details. you can read the code release readme on the stern website to see what they've changed in the code in later revisions, but there shouldn't be any show stoppers.
As I was reading through the rule sheet after I had played the game a handful of times, I had lots of "Ah Ha!" moments. Everything made a lot more sense the next time I physically put myself in front of the game.
I love this game for the mere fact that its something you need to slow down and think about playing. There is such an emphasis on the shot multiplier to blow up the score by trapping the ball, unlocking and moving your multiplier, and locking it back in before you execute your next shot, all while the shot multiplier timer is counting down on you. It's intense, and sometimes confusing, but so rewarding once you get a grip on it.
Here is a short video clip where I took the shot multiplier to 20x and worked through the shots in the Escape from Boba Fett mode, all while keeping the shot multiplier alive and getting a pretty decent reward for doing so.