Yep. Built with Bevy similar to how Godot is self-hosted. They are still figuring out the details like which UI framework to use and how to save scenes. Which abstractions to introduce - nodes like Godot, objects+components like unity, etc? Then debate on how "prefabs" are designed - are they just bundles? Entity and component serialization.... Tons of architectual decisions.

It's coming together.

The UI framework will be bevy_ui just like godot uses godot ui library. What needs to be done is improve it so it can actually work for making a complex app.