Drop target banks increase bonus X. Completed banks adv X only if previous are also down. Ex. can't collect 4X until 3X and 2X are also down
Bonus (max 15K) will be collected once all drops are down, at which point they will reset and you start the whole process over
Spinner and star rollovers advance bonus, completing banks lights a top lane for an award. the purple banks lights extra ball lane
Getting the 3-bank of targets down lights the 2nd rollover for an extra ball, if enabled. Extremely valuable.