I think many of you will find this interesting: I just received a letter from Walter Devins, Esq General Counsel for Imangi Studios, LLC, saying that my game (QUADRUM) "is identical to the Work and clearly used the Work as its basis". (Work = Imangi) Also he says "Therefore, you have willfully infringed Imangi Studiosrights under 17 USC Section 101, et seq. and could be liable for statutory damages as high as $100,000" - that is, if I don't remove it by November 11. "Imangi Studios demands that you immediately cease...." I will post the complete text of this letter later, for now just one more quote: "The following is a non-exhaustive list of copyright infringements of the Work: 1) The goal of Quadrum is the same as the in Work: "Slide rows and columns to combine letters into words" on a grid of letters. 2) The piece moving mechanics are exactly the same as in the Work - using your finger to slide rows and columns. 3) Words are formed left to right and top to bottom in crossword fashion in Quadrum, exactly as in the Work. 4) When you form words in Quadrum, they light up, just like in the Work. 5) When you clear words from the board, they get replaced with new letters, just like a particular mode of the Work entitled Speed Imangi." So, does it mean I can not make anymore games where you slide letters on grid to make words? Or game where you have to make words from left to right? Point 2 is a killer - you use finger on iPhone, this is how it works. I will not argue - Quadrum has simular mechanics, but still, it's not the same. And, believe it or not - I did not see/play Imangi before releasing Quadrum - was not looking at any word games - just had the idea and wanted to implement it. So, would appreciate any educated advices, all the comments are interesting as well.