Too many ads with one playing after every game. I like puzzle & logic games but this game is really boring. Turning off the Sound in Options was very difficult & required a lot of tapping before it finally responded & turned off. Double tapping to make a check appear doesn't always work easily. The red X appears after the first tap & sometimes won't change to a check mark no matter how many times or how fast I double tap with my small fingers on the squares. Uninstalled