Web Maker's user interface is made to feel simple and accessible so that you have all the required things at your tips and still doesn't look cluttered for someone using it for first time.
On the top-left side you can see the title of your creation. Click on it to edit it anytime.
Create New, Save or Open a creation
On the top-right side, you have the 3 buttons to create a new creation or save an open one. Also you can access all your saved creations from the Saved Creations Pane by clicking the Open button.
From the Saved Creations Pane you can also export or import all your creations at once. Exporting generates a JSON file which you can backup in your Google Drive, Dropbox etc.
On the bottom right-most end you can access the app settings. Lots and lots of useful settings in there. To know in details about settings, jump right here.
Besides the Settings button, is the Changelog button where you can read all the changes in the app for each release version.
Next you have some layout options to choose from. Select whats suits you best. This setting is saved per creation basis, so each of your creation can show in a different layout that you see best for it.
Web Maker gives you quite some options to export your current creation to share with the world. You can save it as a single HTML file to upload it on a server, or open it in CodePen or take a screenshot of your preview.
Help and Share
On the bottom-left side are few help options, one of which shows you all th keyboard shortcuts available inside the app. Also there is a tweet button you can use to share Web Maker with everyone :)