Trinagon Sample comes from Lucas Pradlwarter.  The object is to rotate sets of 6 triangles in order to rearrange the dark purple triangles to match a given pattern.

Tap once on a circle and the surrounding 6 triangles will rotate clockwise. Tap twice - anti clockwise.
This game reminds me of Mad Triad which was a failed mechanical puzzles because it broke too often. (I think I have a copy.)https://itunes.apple.com/us/app/trinagon-sample/id1456473052"mt=8

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