Game Line Free

"Color Lines (aka Lines) is a computer puzzle game, invented by Oleg Demin and first introduced as a video game by the Russian company Gamos (Russian: Геймос) in 1992.

In 1995 the first Windows version was developed by Igor Nedelko and Andrey Akselrod for the AbrewSoft company as a shareware. This was a faithful remake of Color Lines, with 256-color graphics and a custom window with buttons for all the functions. The characters on the pillars, champion and pretender, were still there, but in a modern office instead of a medieval setting. The figurines to the right was ever so slightly animated, blinking and tapping a hand now and then. The ball with the four cyan arrows was for moving the window around. A new concept of a four-color balls on advanced levels was introduced with this version"
Reference :http://en.wikipedia.org/wiki/Color_Lines

So now, Game Line has been made in iOS platform. So, you can play Game Line in your iPad (and iPhone soon).
The Game Line has nice and simple graphic user interface so user can play game easily.