In order to add a new account, enter your email address, set a password and click on Create your account.
You will automatically log in the dashbord, but you still don't have the opportunity to create your studio or game on this step.
In a few minutes, you will get an email. Click on FINISH REGISTRATION button and get started.
If the button doesn't work, you can get its link (by using the context menu) and paste it in your browser.
After the creation of account (even if you haven't finished the registration yet) you are able to open Game of Whales demo-studio.