I have not had any reply from Vista Publishing, and they have still not provided me with any information regarding the copyright holder they claim to be acting on behalf of, their right to act on behalf of this copyright holder, or the specifics of the supposedly infringing puzzles, or evidence of their puzzles that they claim they infringe upon.
Any advice as to what my next step should be? I have asked twice for this information, and apart from the original letter I have received nothing from them. I'm tempted to just stick the game back up.