You are in the middle of a vacant lot. Around you are a horde of endlessly spawning aliens, their space ships parked in the air nearby. Apparently, your goal is to shoot the aliens as quickly as you can with your rifle, while avoiding the black silhouettes of humans mixed in with them. However, there are no penalties for shooting the humans, which you will be forced to do, because the aliens spawn so rapidly that you will soon be surrounded by a crowd of them. You can shoot and destroy their spaceships, but this does not slow down the aliens. Soon, there are so many of them that you end up walking on top of them! They do not harm you, but rendering them all will start taxing the processing power of your device. My headset has no trigger, so I must shoot by reaching through the nose opening to tap the screen! Object of the game is to shoot as many aliens as possible before the game crashes!