The GPL version of Tetragon Fortress
You are free to reupload this project to Roblox with modifications, as long as you either:
a. set your place to Allow Copying b. upload the project file somewhere publicly
You should also state that your project is based on original work by RegularTetragon et al. and link to the original at https://www.roblox.com/games/44575124/Original-Tetragon-Fortress