it's surprisingly hard to keep the civilization growth under control.
though as long as you can limited to one half of the map, stalling for good cards is pretty easy. got a win in 120 turns.
it is a fun little game!
i do have some small complains though. it is not possible to deselect a card after you select one, which means ones you clicked a card, you can't use the exclamation marks anymore, since the card click takes priority.
also, the card selection is a bit weird. i always got too many destroy 1X? cards and 1X1 cards, which are pretty useless in most situations since they can only partially delay the expansion by a turn or two without making a real dent in their numbers. you may want to look at the card selection algorithm a bit more.
on another note, i found it strange that the exclamation marks work the opposite of how the cards of the same color work.