Hey sorry for the late reply! The writing is not just suggestion, it kind of like publishing on fanfiction.net or something. You go to our website, sign in with your google accounts, and you can use our interface to write some text stuff! Then you can find you story,, or anyone's story in the game through the ship menu, and play it :)
The scripts are stored with Firebase, and translated to a sequence of animations and stuff when it's loaded into the game! If you would like to talk with us or smth, you can join our Discord :D