[amethyst-engine]

Yup. You can find the current editor work here: https://github.com/amethyst/atelier-editor

It is in very early stages. We are developing it as a WASM app that runs in a system webview, or can be accessed via a regular web browser for a more cloud-y experience. I'll take this opportunity to promote the awesome Yew project (https://github.com/DenisKolodin/yew) which is what we use for the frontend.