The world has been invaded by space monsters and now they want to dominate our planet. But there are still little bird heroes left in the world who want to save humanity from evil. Help them fight the aliens. Use the huge slingshot to shoot the birds at the enemies. Each bird has its own abilities that it can use to destroy enemies more effectively. For example, some birds can explode and do more damage to enemies. Complete all levels and kill all the aliens to bring peace back to Earth.