When evil birds settled on the planet Poseidon, they did not anticipate that there's not enough to live comfortably, both on their home planet Earth, because they did not know that every night the planet covers the asteroid rain. Save the birds from this stone rain soon as you can. Rather, think up for them a canopy under which they can hide and wait out the destructive element. With each level you will be much more sophisticated and come up with new and new shelters, or angry bird will die.