Its a good challenge, until you get to the high sections. The computer lines seem to go faster than the ones we selected.
So we did a video of the game in slow motion and found, our lines went slower. The placement of the lines / dots does matter, however. Some puzzles have the same number of dots to start and we dont know what colour we should be. Until you loose one time than you can see your colour on knife., etc.
MD18 about Lines the Game