Yes, you can!
For subscription transfer:
1. Create a new account with the email you would like to use.
2. Provide the username and email of the original account, and the username and email address of the new account. You can contact the helpdesk here https://www.mathgames.com/contact-us.html or email us directly at email@example.com.
Note: This is only a subscription change, it does not include a data change.