I've been seeing numerous posts about the lack of functionality on the site.
There are (kind of) two versions of this site (or something).
The http version: http://textadventures.co.uk
The secure, https version: https://textadventures.co.uk
I see mrangel advising everyone to use the https version, and that solves everyone's problems; so, yeah: use the https version.
I opine that everyone should be using the https versions of websites, if available, anyway. (Do an online search.)
Also, the latest version of Firefox has an HTTPS-Only Mode setting (at the very bottom of the Privacy setting screen), which pretty much handles such things.