Skillshots are lapable and unlimited in scoring possibilities. They are only available from a full plunge.
Skillshots are only available on initial plunge per ball and not available after locks or invisibility cloak escapes.
Hit the rainbow flashing arrows from the upper left flipper.
Once the ball goes past that flipper the skillshot opportunity is over.
On your initial skillshot if you hit either orbit the ball will return to your upper left flipper again. Hit another skillshot to score a super skillshot. Continue to lap that shot as much as possible to stack up millions.