Immortal Run: I Am Increasing My Steps in Human Epic

When he woke up, the world had not yet opened and was as chaotic as a chicken. The time-traveler Xiaoshuai brought the "Running to God System" and traveled to the beginning of the universe. At the beginning, he only had one pair of legs and a hundred years of life. The system told him: for every kilometer he runs, his life will be extended by one day; by completing the dungeon, he can travel through history. The only problem is - there is a guy named Long Aotian who wants to steal his lifespan every chapter. The "Chaos Beginning" copy is opened, Xiaoshuai transforms into Pangu, and his three hundred years of life are taken away from him at the beginning. His only option is: run! Run as fast as you can! Run until the sky collapses and the earth splits, run until the gods tremble!