Haven't really setup a dev blog yet, but I will soon. In the development side there isn't anything overly complex actually. The app doesn't use any graphics/gaming library, it's developed in native Android targeting versions 4.0+, mainly to avoid spending a lot of time testing and adding patches for older devices. The backend is done in ruby but it will probably be rewritten in erlang/elixir in the near future if the game gains traction. The main reason being that my friend which developed the backend works full time as an erlang developer and is eager to try out elixir on a real project :)