更新于2019年03月27日
Google has changed their framework for logging into Google Play. I have been working to update the app to using Firebase. I just don't feel that it is ready for production. I would rather not add the possibility of bugs. However, since the framework has changed, I knew that my game would not be happy with it, so the signing into Google Play has been removed for the time being.
More details of my rewrite can be found on the facebook page at https://www.facebook.com/walltechcompany/