Put Ball in top lock first by making right side drops. Avoid lower lock and this will allow locked ball to act as extra ball on a drain.
Left drop targets in order light lock for two-ball multiball
Left drop targets in order AND right drop targets in order light two locks for three-ball multiball.
Green X and Orange X multiply each other for a possible 25X. The green multipliers carry over from ball to ball. The orange reset on drain.
Finishing the drop targets advances bonus multiplier as well as lighting the locks - they're essential to progression.
A good starting point is to focus on backhand shots. Backhands from near the top of the flipper will cleanly hit the target bonus.
Both flippers have independent lane change