I found the sideswiping way too sensitive on mobile: when I just want to swipe right once I go through two maybe three pages. To scroll right just once I need to make a concerted effort to swipe just the right amount.
Scrolling to the next section works well but scrolling to a previous one feels too sticky now (requires too long of a swipe to the right for me at least).
What a great project, I'm really enjoying it. Well done!
Ok will test some more.
The problem is kinda Firefox actually. Swurl is using this newish css snap feature, but Firefox's implementation is a bit buggy. Sorry...