If anyone is wondering. "what the hell are space stars?". They are stars found in space, you have to reach a high altitude of about 50m and you will start seeing pace stars, get them because they are worth more, plus you need to collect them for the achievement
One little problem with the Pawn-resembling pieces. Once they get to the enemy's back row (and aren't on their flag) they cannot move, even sideways. Perhaps if there was a 'pawn promotion' or someway of stopping this issue, I would love to see it.