nah, the demo just isn't ready yet (A lot of things have already been programmed at least). These last two years haven't been easy on everyone so things have slowed down significantly, and I've been focusing all my efforts on my own indie game pretty much. BUT I still plan on releasing a demo for Cosmic Network once I have my footing and some more time, so don't worry ;)
I’m glad that you didn’t give up on the game.
I also started making my own Battle Network fan game in RPG Maker with the isometric view, but at some point stuck on changing the collision logic. I guess we all just need to combine our efforts on making the game and divide the roles. Like one makes the script another one draws the sprites, yet another one creates the maps, and so on. And if one person cannot do something, another one will take its role.