Its up to you to save the earth from hoards of Blitters! Make sure you destroy them all while being careful not to get hit by the Laser Barrier they deployed that slowly moves down toward your ship. Your weapons cant penetrate the barrier and any Blitters that are behind it are safe, listen for the warning alarm that the barrier is getting really close to your ship. Get an extra ship each time you clear out all of the Blitters. Get the highest score and share it with your friends.
Tilt your device left and right to move your ship and tap the screen anywhere to fire your weapons.