Overall pretty good!
The game is nice looking and mostly work. I have solved 533 puzzles, which is currently every puzzle. It becomes tedious to close the prompt suggesting landscape mode. The game freezes up now and then, which can only be solved by restarting the app. I had missed a few puzzles and the only way to find them is by tapping through the menu. There needs to be a better way to locate uncompleted puzzles. I look forward to more puzzles being added!