Quoted from JWV:Any more tricks to get more points?
I know about the hitting both buttons trick, in fact some of my friends picked up on this watching me play and now do it as well
Having US roms is a plus over EU roms (like I have!) as it only takes 15 switch hits to finish either bats or rats (I forget which) whereas it takes us 20.
Can't think of much else aside from doing whatever it takes to get extra balls (2 video modes etc) unless you are playing strictly 3 balls only. You could fit regular flippers instead of lightning flippers, but where is the fun in that!