Cool Lines is a free puzzle game developed by AZS Software for Android. The game's objective is to avoid filling the board by forming lines of five or more balls of the same color. With a simple and easy-to-understand gameplay, it's a great game for puzzle enthusiasts of all ages.

The game includes many different backgrounds to customize the game and make it more visually appealing. In addition, players can also choose to play with shapes instead of colored balls, making it accessible for color-blind players.

To play, simply move the balls to form lines horizontally, vertically, or diagonally. If you form a line, you gain one turn and the score increases depending on the number of balls removed per line. The game ends when the board is full, so try to get the highest score with combo bonus by building several lines in consecutive turns.

Overall, Cool Lines is a fun and addictive puzzle game that offers a great challenge for players of all ages.