Complete all 4 banks of drop targets, ideally in green-yellow-red-blue order for bonus multiplier efficiency. When base bonus is maxed at 20K shoot for the top saucer to collect and reset.
Drop Target Banks
All targets score 500 and +1 bonus advance
Complete a bank to light that banks targets for 5K each
Completing banks also advance a progressive Bonus X
2X: Green
3X: Green + Yellow
4X: Green + Yellow + Red
5X: Green + Yellow + Red + Blue
Bonus
Advance base bonus from any drop target and side lane
Max base bonus is 20K, which then lights the top saucer to collect bonus w/ Bonus X, and resets base bonus to 1K