We have received many reports on app crashes and black screens in various parts of the game. This bug seems to have occurred with our latest v1.0.0 of the game.
Our developers are currently working on patching this issue. We greatly apologize for the inconvenience and we will update this notice once the problem has been patched.
Thank you very much for your patience.
Edit: This issue has been solved as of May 11, 2017! Please reinstall Blustone if this issue persists on your game. Thank you very much for your patience!