What's Happening is a free puzzle game developed by WestRiver for Android 9.0. The game is based on the concept of change blindness, where it can be difficult for the human eye to notice slow changes in an image. The gameplay is simple: look at the pictures and find the changing part, then tap it. With 168 photos and three difficulty levels (Easy, Normal, Hard), this game is easy to learn but difficult to master.

One of the best things about What's Happening is how fun and bewildering it can be. The game is easy to play, but the challenge of finding the changing part in each photo keeps you engaged and entertained. Additionally, the hint feature is useful for solving difficult photos. Overall, What's Happening is a great game for puzzle enthusiasts looking for a fun and challenging experience.