Android version

Hello I have a problem. It is not associated with bug. Before purchasing the game from the Google play, I decided to the latest version 0.8.0 from the Internet. But I saw that the game needed Android 2.3.7 + (I have 2.3.6). and the game is not installed. A Google play says that the game is available for my device. And I do not know. Real that is needed to play 2.3.7? It is a question about today's version 0.8.0. sorry for my bad English