Smart Color Path

Drag the color circles and try to place them in the path.
Check the connections to see if two colors can be put side by side in the path.
The connections can be displayed as a list, or in the circle itself.
Keep placing the circles until you complete the path. You may have to replace the circles several times until you find the only possible solution.
Three difficulty levels and unlimited number of games for you to play.
What review sites say:
The Smartphone App Review:
"Finishing one of the tougher stages here without a hint is very satisfying, and one of the best feelings in iOS gaming."
rating: 93%

Appszoom:
"don't let the minimalist design fool you: this is a devilishly difficult puzzle game with a difference."
rating: 7.3
Best Apps for Kids:
"Highly Recommended. Perfectly safe for children of all ages to play."
rating: 4.6 stars