Space Invaders 3K for the ZX81

https://www.youtube.com/watch?v=heBlun6qEs8

#SpaceInvaders3K #ZX81 #Action #FixedScreenShooter #FixedScreenShootemup #FixedScreenShmup #Shootemup #Shmup #SpaceInvadersClone #SpaceInvadersVariant #SpaceInvadersRipoff #Macronics