This is a surprisingly well-made mod for a demo. Although it is lacking a lot of content, I think the stuff we do have currently is very well made. It's also very well optimized, which most mods don't seem to do well nowadays.
I feel multiplayer should be worked on a bit however, such as a "Private" setting for game hosts, which removes the game from the game list and join random features.
A way to kick/ban players from a server would also be nice for hosts, because sometimes I've hosted games and tried to play with my friends but there's next to nothing I can do about except disconnect and make a new server.
I would also like to see a keybind mapper, it would be useful for some players that can't properly use WASD (for example French keyboards have a different layout then English keyboards)
Overall this is a very good mod wih a lot of potentional, and I really hope this game progresses well without much issue, good job.