Best way to use html/php products from CodeCanyon into Wordpress?

I want to ask You about the best practise to use CodeCanyon products in Wordpress.

For example when I buy simple game in html - how can I put it into Wordpress page? By Iframe? Or maybe is better way to do this? If Iframe is the best solve how write the code to have still responsive product?

Best to ask the item author as some items can be integrated differently, some items cannot be integrated, some items can be embedded and others (most?) have to be used totally separately to WordPress.