I also agree with Nicholsml. I really love this type of games, but it really is hard to point out such small differences in such a big canvas. Sometimes your eyes just play tricks on you from staring to hard into each detail!. I do like the advertisment though, I think it is a clever idea to get art in the market and it was turned into a game to broadcast it! however, I think the differences should be a little more obvious or concentrated on a small part of the whole painting.