Unfoldit comes from Clifford Panos.  Imagine a square piece of paper has been folded and some holes have been punched.  Can you determine where the holes would be if the paper were unfolded"  That's the object.
Sure, some of the folds are easy: horizontal & vertical and perfectly diagonally.  But things get complicated when there are multiple folds. I particularly like the challenges where a vertical fold is followed by a partial diagonal fold.
I solved all the 'easy' levels. 272 of them!  I waited about a month for Clifford to upload the medium levels.  Of which, there are some 500 levels!  They're much tougher!

The graphics are outstanding. This game is a winner!
https://itunes.apple.com/us/app/unfoldit/id1248922247"mt=8

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