oh no no the desktop application is itch.io's version of steam. preforms the same kind of functions as steam on your computer would. I'm not exactly sure.. how i'd do the html thing?(I'm not tech savvy and have bad luck with it, but hey, I'll give it a swing.
Eeep! I'm sorry, we haven't used that app ourselves. If that fails, you can also play direct from us at https://www.sinspirational.com/paradise/index.html. That should run immediately on being clicked.
Hope that helps!