Thanks for the swift reply. I've uploaded the 'zip' file, but can't find where to check 'This file will be played in the browser'. What next, please..?
It's located here, where you upload.
'Fraid not, that's not an option proposed. Here's what I see...
At the top, make sure to also set "Kind of project" from "Downloadable" to "HTML"
OK, that's the key..! It works, now; many thanks.Have a wonderful day.