I was considering spending money on this game. Then I decided to add up how much I would have to spend to actually make a decent ranking.... then I realized that the more real life money you spend, the better you do. Then i realized that I would have to spend atleast 50 bucks a week on this game to get anywhere....
THEN I realized that the only thing you do in this game is make money.
This game has amazing game balance, amazing difficulty curve, and amazing progression. I never comment on games, but this game should be what all tower attacks games should strive to be. Great work.