It's aight; no real tutorial though--which isn't a problem for game mechanics, but is for all the features and controls that are available to support you success. Compare with a game like Tametsi that has a list of tips and features explicitly on the main menu for you!

Very fun variation of sudoku. The puzzles were just right - not too easy, not too hard. There are multiple themes on the map and each theme has a unique mechanic to it. As a result you don't get bored because once you solve a few of the puzzles the rules change. There are two difficulty modes and the only difference between them is that the easier mode does some of the counting for you - if a row sums up to a correct number it will change into green. It's a cool option to start with, but in my experience the puzzles were even better when you keep track of everything yourself.

A beautifully designed puzzle game with a relaxing atmosphere. Simple to learn, yet challenging to master. Perfect for unwinding!