In a previous version I was able to turn off the sound. In this one I can't. Even though the individual puzzle allows the sound to be turned off, the main screen when the app first loads does not.

As I am playing the screen will suddenly go blank. It is then restored very quickly but what I was doing is temporarily frozen. This is very distracting and takes away the relaxing element of doing these puzzles

i can't share finished puzzle with facebook friends

I read the other reviews, and I think some of them didn’t know how the game works. The puzzles are as easy or hard as you want - you just move the bar under the puzzle to adjust how many puzzle pieces you want. I don’t have any issues so far. I had another puzzle game where you could rotate the pieces making it more difficult, but for some reason it quit working and I found this one. After a few games, I decided to buy it - which is very rare for me. Those of you who like puzzles, give this one a try.