Or download the test apk file and test it on your android device
Swipe the finger on the screen to move the ball. Each time the ball passes over the tile it will fill it with the color. Fill all the tiles to complete the level and unlock the new ones. Game currently has 51 levels, try to complete them all.
All levels are stored as a prefab inside the "Resources/Levels" folder so you can easily change them and add a new ones.