Amazon launches off another app today that puts a new spin on an old classic with Defender. This simple point and shoot game is very reminiscent of Missile Command for the Atari complimented by some elements common in tower defense games. Come nightfall missiles are being launched at your city and your only defense is to fire back! Simply touch the screen to target locations for your missiles, they will launch there, and explode. As you complete levels, your earn points which can be used to upgrade your weapons and defenses or repair your towers.