How could we enter friend emails and play with them???

You can invite a friend or create a referral link for your friends to click on on the Referral page. You can keep track of your referrals on the Settings page.

You can only use this if your friend has NOT already created an account. They have to create an account from the link that you give to them. If they don't use that link that should be an area when they sign up where they can put in your username as a referral.