Greetings.
I decided to return to jump back into the game, and do my actual part in being of assistance to all the people I both encounter & need help, with this post being one of them.
Although it is clear that the various users had provided answers (and even proposed & created a hopeful new allies for potential future projects) I'd like to say that creating a multiplayer game is far more complicated than a mere modification. A multiplayer game isn't just a 'multiple instances of one thing, shared across', it is a complete different concept that, given the state of the game would add more stress, work and difficulties. But It doesn't mean that it's a pipe-dream of wonders nonetheless!
In any case however, mrdrnose themselves had stated right below the game description his thoughts on multiplayer.
Q: Will there be a multiplayer in the future?
A: Most likely not, due to the lack of networking experience and lack of foundation for net in the game.
In any case, I hope you're enjoying the game even if you'd be 'alone'. Were here for you to ask and support one another!