Shoot Aliens

Alien's Assault Year 2050,planet earth is getting attacked by aliens. You have been given responsibility to protect the your planet from getting captured by the aliens. You have been stationed above earth with your space ship and you have to stop aliens crashing on your planet. How to play- Tilt your screen to handle the spaceship. Touch screen to fire. There is limited amount of bullets and it gets reloaded automatically after 30sec.