Use the Arrow Keys for the directional inputs and the B and A keys on your keyboard.
Here is the breakdown based on the most likely interpretations of your request: Cyber Tank (The Retro Game) If you are looking for codes for the classic game Cyber Tank Cyber Tanks Cheat Code Plane
Start a new "Skirmish" match against the AI. Do not use multiplayer; the cheat is disabled in ranked lobbies. Use the Arrow Keys for the directional inputs