Color Tower: free puzzle app game for iphone, ipad

 Color Tower comes from Tanu Kush.  The object is to unstack the tiles and restack them according to the master plan.

 There are 20 levels. I did the first 3 and the last 3. As a thinking puzzle, I'm not feeling the addiction. But Color Tower has gotten very good reviews lately. I wish the board could be rotated in order to tap those back cells.  

 http://www.peepalapps.com/contact-us.html