Casual game is a simple, easy-to-play game genre, which is suitable for people of all ages. You do not need to invest too much time to level up. All is simply for entertainment and enjoyment. The gameplay of this genre is quite diverse including puzzles, finding hidden objects, adventure… The game image is simple, familiar but still extremely eye-catching and interesting. The operation is also very simple, just touch and swipe on the phone or mouse button. You can list some very popular Casual Games such as Angry Birds, Angry Fruits, Candy Crush Saga… These games are usually suitable for relaxing in a short time, helping you to relieve stress after hours of work or studying.