Conclusion: a game in which much has been taken into account! Very good. Long version: it is a simple game. What I found very nice in the game, is that it has some useful features. Pro: 1. You can skip levels. This is useful if some levels should be too difficult. 2. No In-Apps 3. If you do not yet find the right pair of image, so you can take the help button, which then displays the image pair. 4. No unnecessary permissions
Cons: 1. I had to click on an image several times. Maybe it was just to meindm 4 "phone. 2. Small pictures. Can be stressful on the eyes for a longer time, so rather take tablets mobile phone suitable.