I got several requests in the past about https://itunes.apple.com/de/app/terraformer/id721031633?mt=8. This app was my first attempt to figure out how mobile development works. Since it is based upon the LD Game Minicraft game from the famous Minecraft Inventor Notch it was always open source and available by request via mail. You will now find the complete project at:
https://github.com/TetrisSQC/Minicraft-Delphi-Port
It is compilable >=Delphi 7 and will work on Android, iOS, OSX and Windows.
Christian