A free program for Android, by Bitmango.

Connect the lines in this fun and creative Line Puzzle: Pipe Art game!

Line Puzzle: Pipe Art is a game with a lot of puzzles to solve by attaching lines of the same color. The main goal of this game is to let the water freely to win. However, be careful not to overlap the pipes. If they do, you lose.

The best thing about this app is you can play it anytime, anywhere you want because it supports offline mode. It is a simple game that you can easily learn and master if you take the time to play.