Very nice
As seemingly everybody else, I enjoyed the story telling aspect (especially the ending) - it was a very nice tough, dare I say a revival, to an otherwise bland genre of games.
I also enjoyed the fact this one wasn't as "nitpicky" as the other spot-the-change games I've somehow ended playing, to solve which you might need a microscope to find a different placement of a tiny dot. On this one every difference is fair and notable, so every delay in a solution could be only put up against lack of attention and not a ludicrous design, which is great. With all that been said, I found the game a little to easy due to the constant reocurrence of the differences - missing bars in the fencing, missing butttons/belts on the captain, missing facial features etc.
But overall - it's a very good game, a good testimony to its greatness is the rightful daily feature (I think it's the first spot-the-difference game to be honored like that), and I'd definitely check out the sequel, if planned.