Hi !
I have some bad news.
I didn't receive any feedback when publishing the demo. So, I decided to stop working on it because I don't want to force me.
I already lost motivation and if I had continued, I would not have done a good game. I prefer to finish with a good and polished demo rather that a bad and unbalanced game.
I published the source code on GitHub as well as the demo if someone wants to finish the game.