Hey there! So this should run natively in your browser (it's not a separate program, just an html extension). Generally speaking if you put the HTML in a folder with the asset pack, then click on the HTML, it should just run through any browser you're using. I admit, I get a little shakier when it comes to sorting it out via the phone, but let me know if that helps at all.
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!