Games : Cant remember the "tank" unlicensed game name [on hold]

OK, this question bugs me all day.

As a kid, i've played a lot of NES. And on our country, unlicensed games were pretty frequent, with generic names like Puzzle or F-15 Civil War that we used phrases like "The Puzzle Game" or "The JET game" when referring to those.

However, there is this "Tank" unregistered game, that is not Iron Tank neither Battle City and uses some sprites of both. The basic mechanics are:

• Kill all the enemy tanks on screen;


• Kill the fixed cannons. They shot slow big bullets(purple color);


• There has a "runner" enemy tank that was fast as hell;


• There was an "SS" upgrade to increase your shots speed;


• More than 20 levels(can't remember the exact number);

The only thing about the cartidge itself, is that it has the default case of unlicensed games, with the word "TANK" at the top, like this:

Any clues about this game? I'm lost on my searches

See more:

• Piracy Is a Part of Video Game History in Brazil