I mainly play these games on mobile and I encountered an issue where if I click resume on a game I started on mobile it will just put me back at the beginning. Are saves stored on the device and not on the website? There are all quest games.

I believe that it depends upon whether there is a special "save" process built into the game or not. But I think the default one is supposed to save it in your browser, and you have to type "load" or something like that. You might have to know the name of the savegame too.

I do most of my stuff in the desktop app. But I want to play more of Pixie's House on Highfield Lane, which I think is browser only. In that one, I think Pixie has instructions for loading your save games.

Saves for Quest games are stored on the site; they should be device agnostic.

I'd advise checking that you are using the https:// secure version of the site. If you login on the forums, but then click on a game link which goes back to the http:// (insecure) version, it might cause some odd issues where the site is confused whether you are logged in or not.

Check for the padlock next to the address bar when you're looking at the game listing.