You seem to be taking this pretty well PC Teen... I say you wait untill the game makes a bunch of money and then sue 'em for stealing your idea
but seriously, this doesn't sound good to me and I can't believe that an actual game company has stolen your idea... probably figured you didn't have the proper copyrights and such :/
at the same time, I'd be a little flattered if someone stole my idea... pissed off, but flattered