Yep been meaning to ask them about some of the issues, just been so busy on my end haha.
Yes, I'm planning to make a prequel-sequel type of thing with similar mechanics, and with the other characters being playable. Camera perspective might also go behind the shoulder to show off Godot's 3D features, but I haven't decided yet lol. I feel like I might be able to also pull that off from the 3/4 perspective it's in now, we'll see :)
I'd like a taste of 3D Godot also! I've seen some examples though, like http://bit-shift.io/trains-and-things.php or the new official 3D demo, but haven't seen much in the way of 3D Zelda or the like. That would be closest to what I'm doing I think.
I have another 3D Godot game I'm making to work on mechanics for a larger project, but after that I might start up the prequel-sequel so stay tuned for that! :)