nice challenge. Have to process the two screens at the same time and use different controls. I like it. I could difenitely see a badge or card challenge for this one.
Not Bad.. But two things about your rotate function. First it is to sensitive, I spend too much time trying to get the pieces in the right angle. Second You can rotate pieces of the edge of the scene and can't retrieve them without refreshing the game. 2/5 until that is fixed
4992 is the best you can get with out using the Next wave button. And that is without letting any creeps through. Now to just figure out how to do it on a budget.