The Buttons for Google Play Services and LeaderBoard needs Plugns which can be easily downloaded and imported into the project. They have not been included in the project at the moment. The resources needed are at : https://github.com/soomla/soomla-unity3d-core https://github.com/soomla/unity3d-profile https://www.applovin.com/ and along with these all these google play services library should be downloaded in your Android SDK.
##The files have not been added as sometimes on adding these libraries and plugins the application may behave strangely due to some functional changes in Unity, This code can directly be run and played at the moment.