How to create new WordPress table and store high scores from a Unity game

Here is an article with sample code that shows how to create tables and insert and retrieve rows using WP functions.

https://wordpress.mcdspot.com/2010/03/15/code-to-dropcreateaccess-mysql-table/

That’s a great start thanks vtxyzzy.
Now all I need is a way to associate the creation of the hi scores table with the user table information. ??

The article below in the Codex shows how to check if the current user is logged in and how to get the user ID.

https://codex.www.ads-software.com/Function_Reference/wp_get_current_user

All you need to do is include the user ID in your custom table so it can be joined with the wp_users table if necessary. I think you would want to use the user ID as the primary key.