If you missed the typing animation, click "Rerun" in the bottom right of the Codepen frame.
The layout was made in a snap with CSS grid 😎
While not truly a full editor, you can type in your own content thanks to the humble
contenteditable HTML attribute.
It would be neat to level this up by actually moving the cursor animation wherever you click, and perhaps provide some kind of fun functionality to create working menus 😊 Feel free to fork and make it happen!