Infinite Energy in the Apocalypse

Boom! With an explosion, the fate of the world changed. Zombie appeared out of nowhere. Mutated Animals and plants arrived with many changes in them. The peaceful yet cruel world changed into a living hell. Streets filled with zombies, people dying out of nowhere. But even with that, the world wasn't finished. The human wasn't extinct. People with superpowers appeared the moment, the apocalypse started. Even with the merry population of 1 billion people after the apocalypse. The world still continued to survive. People continued to fight with the zombies and the boring world turned into interesting. But the thing that changed everything was a boy who got a random window status and infinite energy with thousand of skills at his disposal.