You are under attack by an unknown villain who sends a barrage of different types of missiles to try and destroy your city. it's a good thing your scientists have developed good trajectory tracking weapons in order to shoot those missiles out of the sky. in this bullet shooter tower defense game, you can -buy 5 different types of weapons. -upgrade and sell weapons -upgrade drones which will allow them to collect your loot faster -purchase and use nukes to do a massive amount of damage all in app purchases are permanent and will be available to you at the start of each game. ads only occur in two places. first, if you want extra start gems for free, you may be asked to watch and ad. you can change your username at any time for free, but you may be asked to watch an ad first. if there are no ads available to watch, you still get everything you want for free.
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