Viewing the source shows an html page without a closing body nor html tag: it's probably not the best case for showcasing it seems.
The layout it all over the place too using FFox, (it's fine on Chrome and Safari) so it also seems to be lacking in some basic cross browser testing, which again, is not good news when show-casing a framework, as a frameworks' prime responsibility is to ensure cross browser/platform uniformity.
Hopefully this all boils down to a simple 'oopsie' in your project, rather than svelte.
