Hi! We are currently only featuring apps or templates in the Shakespeare showcase which can build in Shakespeare. If you get the "Edit with Shakespeare" feature working I'd be happy to add it! Here's the "Edit with Shakespeare" url that is currently rendered from the submission.
https://shakespeare.diy/clone?url=https%3A%2F%2Fgithub.com%2Fvcavallo%2Fcatallax-landing.git