This is a simple but very absorbing game. A large number of people have played it since it appeared as a browser game for personal computers on GameSaien.com.
Gameplay
Tap on a blank space. If the color matches the nearest neighboring tiles, vertically or horizontally, from the tapped space, you get the matching tiles.
If you have color blindness, please try the color-blind mode in the setting screen.
For more details, see the support page.