I have two site upcoming. The first shows three online playing cards as a demo of my paid service, and is free to use. Once they have purchased a license on PayPal, they will have access to the 54 online playing card version.
The game has no back end, as far as I know. The questions, hints and answers are CSS, as far as I know.
I have an underlying WordPress site where users can optionally log in and orders can only be placed by registered users. So I suppose I can provide this site only to logged in users who have also purchased this license.
How do I do this with WordPress? I also use WooCommerce as my storefront.
I need to block non-licensed users...