Puzzles are too simple to feel engaging. Levels take less than 10 seconds each. There are also far far far too many ads, spotted 3 different types of ads in the 10 minutes I had it installed. Bar ads, ads for a "special hard level", and ads after every other level. When paired with a question over whether or not you like the game, where the "No" button doesn't do anything so you have to press "Yes" to rate the game, this "game" is really just a cash grab from advertisers.