Download, please.
Html works on any OS, with a few caviots. Android users need Joiplay (which I have), and a downloaded html in most cases on this site. Sometimes the downloaded file isn't necessary, but like most authors... your file just isn't working without a download.
Your page gives this message "This game is not designed to run on your device. Add it to a collection to play later, or you can try to run it anyway." Same file will work... as long as it's stored locally on the device.