The concept of this app is great, at a certain point makes your brain work hard and more creative to remember things, but it could be done better. Firstly, the pair game should be represented in a way where you can see all the pictures so there won't be lucky shots. Secondly, there are bugs such as when you play and press home button after coming back to your game it's finished. Whyyyyyy! I have remembered from 15 to 30 pair of pictures and it's all for nothing just because I wanted to check an e-mail! Moreover, please make a real instruction in the app on how to exercise in a right way (that you should group images in chain play, some examples or YouTube video). I hope that developers didn't forget about their creation and will make it better in the near future.