Yes, as I'd written in the Homebrew Development Thread, I was the developer of the game
It was just a tiny little test, therefore I didn't announce it in an extra thread or like that, even didn't link it in the 3dbrew-Wiki.
I didn't felt wrong about naming a tetris game tetris, but I'm not a lawyer, just a developer with ordinary rational thoughts - therefore, probably you're right, as lawyers don't need to be rational
Currently I'm working on something else for 3ds, but when I find some time and a good name, I'll rename it.
But please don't expect development around this game to be completed, it has a few bugs (better don't rotate pieces around the corners) I won't fix.
I will accept merge requests, so feel free to fork and extend the game if you want. Its there for educational purpose.