I, the Delivery Boy, Deliver Food in the World of Immortality

A takeaway boy who worked overtime until he died suddenly was reborn in the world of immortality, and was bound to the "meal delivery and immortality system" - every time he delivers an order, he can randomly obtain an ancient magical power, but if it times out or receives a negative review, his cultivation level will regress. The first order he received actually came from the demon king who was undergoing a tribulation.