Just made one tonight on Writing.com

Feel free to stop by and add any chapters if you're interested. I'll try and add more to it myself in the future.

Mind you it only just started so there's not much there besides initial decisions chapters, But if you have an idea for a story but can't think of a good ending feel free to add it. Just follow the rules posted at the start.

https://www.writing.com/main/interact/item_id/2120732-Plumping--pumping-Ponies