An easy way to have a good game is play as R2-D2 and choose light death star missions. From there it's easy to start Destroy the Death Star.
Shoot 5 targets with red lights to begin TIE Fighter Hurry-Up. Hit the TIE Fighter, then bash the action button to advance to Multiball!
Start Hyperspace Hurry-Up by completing the bottom lanes and shooting the lit yellow shots. Collect 3 Hurry-Ups for Multiball.
Hit the death star to release the third locked ball for 3 ball multiball.
A good way to start is to have the multipliers on DS/Endor/Hoth, then just work Endor and Hoth with the left flipper. Easy 100+ million.
Always choose Light Tatooine Missions from the skill shot. Otherwise, you will have to make three difficult scoop shots to light them.
Depending on the target you hit off the plunge, you will get a different amount of bonus multipliers.
Although operators may adjust level or turn them off altogether, extra balls light for the third mode or for getting 80 tie-fighters.