What website did you put into it? If your site loads images via javascript we don't capture it...
Would definitely recommend showing a message akin to 'no images detected' in that event.
Maybe with a few common reasons that might happen(such as the above)
Cool stuff though!
I don't load them via javascript, but I have an onError handler where I replace images with icons if they don't show up. The site is https://lifeprotips.com