A free program for Android, by HappyDream.

Connect The Dots – Color Line is a simple, relaxing, and addictive puzzle game where you connect the dots of the same color to advance to the next level. You’ll be playing through hundreds of levels to get to the top, so you’ll have plenty of time to practice and improve your skills. 

The game contains a number of modes, including:

Free Play – play through hundreds of levels, or race against the clock in time trial mode.

Time Trial – play through one level and see how fast you can solve it.

Challenge – try to get the highest score possible in the given number of moves.

You can also download Connect The Dots – Color Line to play on your mobile device.