I only have limited resources to test the library. I managed to get it working in Safari on MacOS (though not perfectly - tabbing through the links in the kitchen canvas moves the canvas out of view).
All bug reports of the site not working on various devices are very welcome!
If it is IntersectionObserver causing the problem (as reported in the other comment) - that's sad. I'm using IO on the landing page to switch off the animations when they're not in view; the last thing I want the library to do is drain people's batteries.
Lots of Safari versions don't support IntersectionObserver it would seem.
Then again, Safari is the new IE.