Line Of Defense

Use bullet bottom to shoot the proper color out of the main canon at tanks. Protect your line of defense from successive tanks attacks. Be careful, if the tank reaches the front line or the bullet and tank's color are mismatched, you will lose. And watch out for the sidelines at some point they might come from all sides. And remember you can use extra shells to destroy tanks just by tapping those purple bottoms beside the screen. Watch out and enjoy the game!