This is a game that allows you to concentrate and calm down. When you feel irritable, try to calm yourself down and observe carefully. Of course, this game is difficult, you need great patience and determination not to accept prompts. There are 5 subtle differences in each level, try to explore! Features: very hard levels no time limited rate stars for each level 5 differences in each level hint to provide a clue pinch to zoom in and zoom out totally free to play