Amazing entertainment for hours If you like puzzles then this will suck you in for many hours
A Top Five Game If you could only have FIVE games, this should be one of those fives. Why? Read others' reviews and if not convinced, give this game a try or try the free companion game, "9".
Love it One of the best games simple but pretty cool totally recomended
Addictive Like all the best puzzle games this game is a very simple concept but much harder to master once you get a few levels in. And by then you're addicted...
Definitely worth it Played 9, loved it, bought this, love it. Great concept and well executed! I'm very pleased. :)
[v2.0.2] Minor fixes
Also on Google Play: 9 (FREE) and 10 Junior (FREE) -- a special edition for young mathematicians.