This is a fully open source free Android game. Feel free to reuse. You may find the app here: https://play.google.com/store/apps/details?id=tech.francium.fifteenpuzzle&hl=en
This is a fully open source free Android game. Feel free to reuse. You may find the app here: https://play.google.com/store/apps/details?id=tech.francium.fifteenpuzzle&hl=en