Fantasy Mosaics 6 is a well made nanogram game. The controls are simple and the game has an auto-complete feature that marks all empty squares once you find all the squares contained in a line. A very interesting feature in this game is the power ups that let you do things like check if a square is empty or not w/o being penalized. The music is very good; it's very relaxing. I didn't gave a score to the story since it's barely present in the game.
The only feature I wish this game had is the ability to mark squares as possibly filled so you can test out different possibilities without being penalized.