31 for 2! i was wary of allowing too many scoring combinations that might make it too easy to play but i think i should have added 31 as a goal which could generate quite a few stars.
i should also mention that i do plan on a score-chasing INFINTE mode; i do enjoy playing a single "deck" but also want the option to climb a higher ladder ;)
thanks for the review and for giving GEMBOT a try :)