Don't use the upper flipper to shoot side drops. You will drain. Instead hold up upper flipper to return ball safely to lower flippers.
Complete A & B lanes at top to double your bonus. Hit lit rollovers to increase bonus.
Hit drop targets to light extra Ball in right inlane. Some folks shoot with the left flipper under the raised right upper Flipper to hit it.
Look out for the center lane light. If lit it will open the gate at the right outlane
Upper flipper can be used for side drops, if you shoot early, to hit upper drops. Avoid shooting too low, though, or you will left outlane!