[Tower defense-like + behind-the-scenes upgrade]
My name is Su Yang, and I have traveled to a doomsday world full of zombies. The zombies can upgrade by eating each other, and humans can mutate by eating zombies with supernatural powers.
But Su Yang does not need to feel anxious when others are short of food in the apocalypse, because Su Yang can produce food for himself by transforming the house. When others are afraid of facing zombies, the gun room launched by the system perfectly blocks the attack of zombies.
Therefore, while others were still thinking about hoarding water, guns and manpower, Su Yang was already planning carefully on the road to establishing a doomsday empire.
