This thing here write:
Really clever idea for a game.... That being said I'm not sure I actually "enjoy" it. I'm not sure if they have a random engine to create the puzzles or if they create them, but it may be more accessible if there was a difficulty setting or a way to start with more common topics rather than incredibly obscure political persons and theorems. Connecting, say, cat to Superman or something might be more fun because these are more manageable concepts with which to develop a strategy, which is fun, rather than randomly clicking on obscure mid-eastern provinces trying to find someone with a common heritage to an obscure prince. Perhaps a hierarchy based on the popularity or edit activity of the articles could yield more accessible entries if it's a random engine?
But regardless, kudos for the innovative, out of the box game idea!!! Keep developing and refining the game and you should get an audience of geeks like me!