Interesting. I'm scrapping the entire thing and building from scratch, so it's long in the tooth anyway. The only animation I have in it is keyframe animation which changes the screenshot on the computer's desktop in intervals. I believe retina images are the problem rather than the transitions.
The printscreen doesn't add the laptop, if that's what you're thinking about (that's already there on the webpage). But the font in the screenshot-of-a-screenshot is completely unreadable.
Plain HTML (without javascript or CSS) can produce very nice results. No need for fancy animations or generated graphics.