JIG: Asteroids have long been the nemesis of creatures living on Earth. Just ask the dinosaurs. Or the makers of that gem of an arcade game, Asteroids. Or the NASA researchers who were trying to figure out if we'd get smacked with a big chunk of space rock in a few decades (spoiler: we won't). Crumble Zone from Rebel Twins understands that ancient fear and it capitalizes on it by letting you save the world over and over again by tossing little missiles towards the sky.