According to a recent post at Tris blog, the developer announces that this game is over! The developer has received a notice from Apple, who have been contacted by the owners of the Tetris copyright and have requested the developer remove the app.
Well — I've received notice from Apple that they've been contacted by The Tetris® Company about Tris. That, I'm afraid, is essentially game over. Do they have a case? No. Not really. I am convinced that if it went to court, the "copyright" claim would get thrown out completely. The trademark, perhaps not — but if I changed the name, to e.g. “Trys”, that would be much harder for them to argue. The trouble is, I'm a college student, and not an affluent one, and I simply do not have the time, energy, or resources to fight this battle right now.
[Two Finger Play Blog]