Update: The Multiplayer feature is coming along very nicely. It is now finally in a working state. It has been a long and grueling road working on this every day for the past year.
It is currently being tested. Next step will be to add and test the feature with more maps.

It's taking longer than expected, as it has been a very difficult journey doing this on my own.
I was hoping it was going to take no longer than a year to have this working, but it hasn't panned out as I expected. I am confident that the game should be finished in the next six months at the most. In the meantime, you can check the new gameplay images posted from the game.
Any comments or suggestions are welcome. Will have more updates soon.