With some, such as determining which numeral or animal is hidden within a set of lines that resemble a box, once you figure out the pattern in the first one, you can easily find it in others. That is, if you play the puzzles close enough together in time to remember what you did in the first one.
I had fun playing this while waiting for my babysitting charge to finish her swim lessons, taking a five-minute break at work, or even to exercise my brain to unwind at the end of the day.
This app is meant to be used on the Kindle Touch. It will not work on the Kindle Fire. It's all in black and white and is interactive. You have three chances to solve a problem. It also keeps track of your time on each puzzle. You can go back and replay a puzzle and see if you can improve your time. It's a lot of fun.
I received a complimentary copy of this app in exchange for my honest review.