Make 3 shots to the saucer via the left orbit to acquire Hold Bonus. Then complete 1 set of A-B-C-D drop targets to increase the saucer score to 5K. Now shoot the left orbit on repeat into the saucer. You'll collect the pin rollovers and complete additional sets of drop targets off the saucer kickouts if you can keep the ball in play long enough.
Plunge to the saucer
A-B-C-D Drop Targets
Each target scores 1K
Complete the set once to light the green star inserts which raise the value of the inlanes and left orbit rollover buttons to 1K and the saucer to 5K
Complete the set twice for an extra ball
Saucer
Sacuer is worth 500 when not lit, and 5K when lit
Above the saucer are lights that indicated how many times the saucer has been made on the current ball
Collect 3 saucers for Hold Bonus, collect 5 saucers for left outlane to award a special
Left Orbit
The rollover buttons in the lane are worth 100 points unlit, and 1K when lit
This is the only viable path to shoot for the top saucer
Bowling Pin Rollover Buttons
Rolling over a lit button un-lights it and collects that pin scoring 10 points and 1K in bonus
Completing all 10 lights a strike insert and awards 10K
Max Bonus is 39K, however, completing 4 sets of rollovers resets the bonus back to 30K