Space Invaders

Ships from an alien source are approaching from the sky Radio contact has been attempted But cannot be established Instructions are to prepare for an attack By an unknown enemy Space Invaders Light speed in 3, 2, 1 Ravenous beasts, as far as the eye can see A plague on a surface A disgusting swarm in the skies With a crash of thunder a new demon appears Unfurling it's rotten wings It lets out a petrifying scream Final boss It's time to fight back