It's a work in progress and not yet complete, but it already provides the foundation for building a game model.
Generated by Rojo 7.2.1.
To build the place from scratch, use:
rojo build -o "Lunna.rbxlx"
Next, open Lunna.rbxlx
in Roblox Studio and start the Rojo server:
rojo serve
For more help, check out the Rojo documentation.