Metropolis: One Cheat Code Per Month

Cheng Yishan traveled through time, and with it came a mysterious code in his head. "Up, down, left, left, right, right, BABA..." Cheng Yishan had thirty extra lives! Since then. Cheng Yishan discovered that a new mysterious code appeared every month. In the second month, looking at the new mysterious code, Cheng Yishan muttered subconsciously. "Panzer" The next second a tank fell from the sky. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.