Please stop embedding files/images from Discord. Discord has anti-hotlinking logic in place that breaks links to Discord hosted files and images when linked to from anywhere outside of Discord. There are a multitude of file/image hosting sites you can use instead.
(more info here)
But you can totally just take what you want from my project and make up your own story and such. Whatever you take, you can credit me for accordingly. It really is impossible to make the game I had planned as a mod; you'd have to use some kind of programming language to actually pull it off. That's why I was creating it in Game Maker. I'm not sure if I mentioned that elsewhere or not.