Its not 100% yet since native windows are handled quite differently in openfl (there is no NativeWindow API, although there is similar) so a lot of the methods/getters/setters on StarlingWindow class need to be wrapped up for convenience, but it is fully working, with the caveat that it is missing certain behaviors that I'll probably finish up tonight followed up by some documentation.
If anyone has any questions about usage or what it's doing under the hood, feel free to ask.