The game is still very much in a beta stage and some bugs are to be expected. But as it becomes more and more playable and fleshed out we are coming closer to a full on Early Access launch, hopefully sometime later during the year.
The demo is to give a sense of the mechanics in the game, how it will play and part of the content that will be in the full version.
If you find any bugs, reporting them helps me a lot to make the game better and to understand how it plays on different systems.
There is an active discord server if you want to join the discussions where you can also find information regarding beta access to the full version of the game.
And please wishlist the game to get notified when it is released as well as push the games visibility higher on steam!