Kudos for not using any pointless HTML tags on the website. I like how you skip head and body. :)
There's no Javascript full stop, no stylesheets (all CSS is embedded in each page) and every page load is a single web request (with the exception of the screenshots page).
Even the SVG logo is embedded in the pages!
Writing it this way also causes each page to be self contained, a download of the HTML page includes all of the CSS, logo and information so it can easily be saved and viewed locally. :)