5 stars: Great game, completed the hardest 500, please add more. Comments about ads... shutttt up! There really aren't that many at all, they aren't annoying or intrusive. Game designer have to make some money. Apart from more games/levels in the 2 hardest groups please keep it exactly the same.
3 stars: *UPDATE- SOMETHING KEEPS CRASHING IT EVERY FEW SECONDS! Omg. It says odd can't open, and occasionally without my help it opens an ad in a browser. It's my favorite and now I can barely play it. It goes to resume screen each time. This only started last week or so. Please fix to get your stars back! I really don't want to find a new one when this one helped me learn to play and I'm only halfway through medium! 5* A GREAT Sudoku game with many many levels and puzzles. I had just learned to do 5his puzzle from a friend after years of failed attempts, but the beginner levels were so helpful that I finally got it and now it's my favorite puzzle game! I like word searches and jigsaws, but this is great. The ads annoyed me at first, but now I love it so much I don't mind them at all! I would recommend this Sudoku game to anyone interested at any level of expertise. Thanks guys! :)
4 stars: It feels like a real brain strengthening game you have to stay focus. Time gets away from you. As you increse your levels. I like it a lot.
5 stars: I have played it for 5 years. It is great but I hope the develop team can upgrade its video quality to HD or FHD or more, also provide ...