I haven't mobile optimised them - I think I'll just abandon the horizontal scroll for mobile and keep it vertical as fidgeting around with the content would be a nightmare. They both work across chrome, firefox and IE9.
Here's the horizontalScroll.js sample site - you can see that when you scroll, it scrolls one full page/section - http://wildflower-pictures-h2.webflow.io/
Here's the jInvertScroll sample site - you can see that when you scroll on this site, it scrolls by how much you've turned the scroll-wheel/trackpad - http://wildflower-pictures-h.webflow.io/
If you'd like access to see how it was achieved, just ask and I'll post the webflow share link