Extract the zipped package downloaded from customer account page to your desktop, in the extracted package you will find zozoplay folder which is the wordpress theme.
You can install the theme in two different ways:
FTP: Extract zozoplay.zip file and upload the extracted folder to /wp-content/themes/ folder on your server.
WordPress: Navigate to Apperance -> Add New Themes -> Upload page. Select zozoplay.zip file. Press the Install Now button to upload and install the theme.
After theme activation you will get to an optional theme setup and demo importer page, you can skip child theme or anything else like widgets or demo import or just go ahead and setup demo site in minutes.