I continually get emails from Google, "Search Console has identified that your site is affected by 1 Mobile Usability issues: site: Content wider than screen"

I continually get emails from Google, "Search Console has identified that your site is affected by 1 Mobile Usability issues: site: Content wider than screen" The thing is, the software I have on http://doomlaser.com http://doomlaser.com is only for desktops. And I just noticed that a direct search for one of my apps, Cursorcerer, is now ranked #2 behind an entry for it on MacUpdate. A little frustrating. I guess I could redesign for mobile, but I would really rather not. Over 90% of my traffic is from desktops for a reason. Whatever happened to getting "the full Internet, not a mobile Internet" on your phone?