I dunno what's going on with "bashed game engine" but had they honored the site guidelines and used the repo's description it would have been a lot more interesting

> The open-source Roblox & UEFN alternative giving you freedom to own what you create. An all-in-one, real-time, collaborative game development platform built on Godot.

Seems to be MIT and "Creative Commons Attribution 4.0 International License" for the game assets