Hello Guilher, I'm still currently working on the project, it takes a lot of time since I'm alone to work on this project, I'm working a lot on it, all I can say is that at the moment I have finish the physics of water.
I don't know when the next update will be available, however many things will change, including a Sandbox mode (Offline) where I'm working on it.
Or the fact that you can import your maps into the game. 😉