Chicken Invaders 3 Christmas Edition

Dash across the galaxy to save our Christmas roast in this festive edition of Chicken Invaders: Revenge of the Yolk!
Chickens.

For centuries we have oppressed them, grilling, roasting, stewing, and stuffing them in buns. The time has come for us to pay. Intergalactic chickens are invading Earth, seeking revenge for the oppression of their earthly brethren! It's time for you to fight for the ancestral right to our Christmas roast. Will you succeed? Will the future of chicken burgers be secure? Or will you spend this Christmas in fowl servitude?