The Planet Exploded, and Everyone Got a Floating Island

I had just woken up when the little blue ball exploded. A massive quake erupted from the Earth's core and destroyed Blue Star. Every human was left with only a hundred-square-meter floating island and a pair of wings for soaring through the sky. The aftershocks gave birth to monsters known as [Earthly Calamities]. Powerful creatures seized countless floating islands in the sky, becoming lords who ruled their own domains; overlords who devoured floating islands; kings who held entire levels; shadows that destroyed civilizations... Survivors will descend from the sky to the ground, breaking through the surface, mantle, and crust, defeating the calamities in their path as they journey toward the Earth's core and discover the source of it all... Should they uproot the source of the apocalypse, or regard it as a blessing that will bring about evolution? Humanity has already gained immense power. Can they bear to give it all up and return their hopes to an uncertain future? Xia Shao's choice is... a wall of shields! Or another wall of shields! An even sturdier wall of shields! A real man stands at the front. He'll descend a thousand levels and smash those scum lurking in the shadows, as a human being! [Apocalypse game + floating-island survival + sister complex]