Yes, I am aware that the project has to be open sourced. When I upload whatever updates I want to the game it will be the "official" build and people can make other versions of it if they want or play old ones. I'm adding extra comments if people want to look through the scripts and want to know how it's setup, or to correct it if it's jank and there's a better way of writing it.
I assume I copy the contents of the license I want and paste it into my gamefiles? It seems kind of weird because I would have expected it to have extra steps. I'm already trying to make sure my game doesn't have any left-over copyrighted content. For example, if a song is royalty-free and I credit it, I should be fine right? Stuff like the fonts are not mine. I don't think it will be a huge problem since most of my assets are my own.
Viewing post in A little over a year of progress: DURIAN Announcement
Yes, that's usually how it's done. You just have to make sure the licenses of the assets you are using are compatible. Some license, although royalty free, are not compatible with open source licenses (for example, a song might be royalty free to use on a project, but you aren't allowed to redistribute the song, only use it embedded in your project. So, you have to check for that).
Most of the time, you can check if licenses are compatible by googling that info.