Running Seedship through Firefox on Iphone has the same problem. But even if it didn't, that wouldn't achieve the goal of maximizing the number of people who can try a given Twine experience. Insisting that users use a non-standard browser to view the twine would be better than insisting that users use a pc instead of a mobile device, but would not be as effective as "it just works". It may seem like a minor point, but from my experience I would expect significantly more views from users on mobile devices than on pc.
Given that Seedship works just fine on another site, and is only composed of text, is there a setting or twine format that makes it work?