The mechanics of this puzzle app are easy to learn but the puzzles become challenging pretty quickly, and that's a good thing too! Unlike many puzzle games I've downloaded, there is no timer for the user to worry about, at least not one that is evident. Users are awarded 1 to 3 triangles at the completion of each level consisting of 25 puzzles. The triangles seem to indicate how many new levels are added for the user to solve. Most of the time I have received three triangles and am told that levels E, F & G for example have been added, however there have been a few times where I have only received two triangles upon completing a level. I ASSUME the number of triangles awarded are based on the length of time it took to complete a level, but since there aren't any instructions or timers evident, that's just a guess.
Without apparent timers of any kind, the user can solve the puzzles at their leisure which makes the game enjoyable and, in a way, relaxing. Each puzzle consists of various shapes (triangles, squares, etc.) that the user must connect by "drawing" a line through them. For each symbol type, two of them contain a unique shape to indicate one as the starting point and the other as the ending point of the line, however which is which doesn't matter and is up to the user to decide. The lines for each symbol type can not cross or share the same path as another symbol type, however there are junction symbols which allow the user to "cross" another symbols path. Each junction symbol resembles a blue stop sign and contains two or three white markers inside which indicates how many times a path MUST go through them. The "trick" is to connect all "like" symbols by drawing a path that connects them, while at the same time, making the paths pass through all of the junction symbols the number of times indicated by each junction symbol. For example, you can start drawing a path to connect all of the square symbols, starting with one of the squares that contains, say a cicle, to indicate it as one of the two squares which is either the beginning or end of the square symbol's path, and ending at the other square symbol with the circle in it. As you draw the path you will find you need to pass through one of the junction symbols to cross another symbols existing path. The puzzle is solved when all "like" symbol types are connected by a single line/path and every junction symbol has been passed through the number of times each junction symbol indicates. If a junction symbol contains three small white markings, then when the puzzle is solved, symbol paths must pass through that junction symbol three times, whether the paths are all for the same symbol type or by the paths of different symbol types. I'm probably making it sound complex but it is really pretty straight forward.
Every time the user touches a symbol a tone sounds. It reminds me of the sounds made by musicians that make music by rubbing or drawing their fingers around the wet rims of glasses filled with liquid. So, as you draw your finger across each symbol to connect them the music or tones change. When you complete a level a chorus of tones play. The tones have a "zen-like" quality and are soothing to the ear. This is a very enjoyable but challenging puzzle game that I will go to often. I highly recommend!