You can cancel SJP by holding down zap button. Try not to collect SJP until you have several stacked and a playfield x, preferably 6x.
Shoot Herman to start a hurry-up. Shoot Herman again to collect it and magna-lock a ball. Shoot the captive ball again to start multiball.
The blue Kitty target to the right of Herman increases the playfield multiplier when lit.
This game by default has no ball saver. Always short plunge to a trap on the right flipper and ignore the low scoring skill shots.