add achievements please! that makes a purchase more interesting

I really enjoy this relaxing puzzle game but, i do not see a way to save a puzzle in progress? Am i missing something or do you really have to complete a puzzle in one sitting?

When I saw "Top" I rejoiced because I thought that each puzzle had its own ranking and instead ... no! The scores of all the puzzles are added up continuously and, therefore, "Top" actually ends up being a useless count of the points of all the puzzles without being able to compare them with other scores (even your previous ones). "Best scores" shows the highest score of each single puzzle, but there is no ranking to compare scores and, next to the score, there is no name written on it. Very disappointed w...