Pretty good, could use a few improvements
Overall a an easy to use interface, with a lot of puzzles. A few things could make this the best out there:
•inclusion of a timer and record keeping of average time to solve per level, number of puzzles solved and available are pretty standard features in other games.
•when a puzzle is solved, your asked if you want to start another but it doesn't ask you which level you want to play. I suspect it initiates a random level because some were really easy after restarting from a more difficult level.
•highlight of selected related vertical and horizontal cells when a cell is selected would be helpful.
•auto pencil marks and smart pencil marks are also a nice feature on other games.
•color theme is boring and can't be selected.
•more contrast or different colors between supplied cells and entered cells would be nice.
I'm glad to have purchased this game, and look forward to future updates.