your eyesight should be tested. In the game, there are two pictures, you should find out the differences between them. At the first sight, you may think they are same. But in fact, there are five different places between the left one and the right one. If you find out a place by which the left one different from the right one, please click the corresponding place on the left one. If you are right, there will be a red circle on where you click. If you are wrong, instead, there will be a red fork. When you find out the 5 differences all within the limited time, you finish the level and enter a higher level. No matter which level you are on, if you fail to find out all the differences, you lose, and you must begin from the first level.