I have finally had time to place the source code in a publicly available repository. I would like to have done this sooner, but have been busy with real life, but now have been able to get it done. The code is available on GitHub at the following link...
I wrote this game for fun, as a hobby project; I hope others find the game fun, but the fun for me is in the technical details of writing the game. I hope to create some documentation that describes the code architecture and key details, but that is many months away before I'll have time to do that.
When writing the game is was always my intention to make it publicly available so that others can see how it was done, and possibly learn from my work. Hope someone finds this useful or interesting in some way.