Flesh Is Weak? I Burn My Lifespan to Forge My Body and Shatter Mecha with One Punch

In a steel city, neon lights are tombstones and the masses are ants. Everyone implants cybernetics and modifies their bodies in pursuit of "mechanical ascension." But my family is so poor I can't even afford the cheapest cybernetic arm. Then one day, a bizarre game called Classic of Mountains and Seas: Primordial Chaos sent me down a completely different path. They spend money to get high-end cybernetics. I spend my lifespan moving mountains and filling seas in the game. They say flesh is weak, and the way forward is mechanical ascension. But I turned my heart into a furnace and forged my spine into a dragon's backbone, then punched straight through the god-slaying mecha those "tin cans" were so proud of! "Flesh is weak? That's only because you're not strong enough!"