This is astoundingly incorrect. At least where I live (int he US) copyright protects the game binary code, the game assets, the game's manual, etc. but doesn't protect the overall game concept or the game's general look and feel. Those things are in the realm of patent protections.
The OP is confusing a moral right (rather, a moral wrong, i.e. he clearly was making a Battlezone clone) with a legal wrong. The game breaks no copyright laws.
I was involved in a very similar situation, where a publisher made a copyright claim against a game of mine in the app store. But you can't copyright a game idea, or the way the tanks generally look. You can only copyright the actual game, or game assets. We pushed back and Apple accepted our arguments and the game went back into the store.
This is abuse of copyright for the sole purpose of eliminating a competitor in the app store, and it's got to be fought, or we're all going to be spending huge portions of our lives as developers fighting incorrect and spurious copyright claims.