Is there a way to limit what photos show on the mobile version of the site some photos look better on the full site but not on the mobile site?
It is possible to set separate albums or collections to be shown on the mobile version of the website, which applies to the slideshow view of the website homepage.
Here is the step-by-step guide:
Website Builder → Homepage → Change Album → Album for Mobile → Select the album you wish to appear for the mobile version.