The no-AI cover is not ready yet.
It was planned for Provecho Coffee in San Diego.
What beginner built
Shipped and open-sourced as offline-first desktop and web apps. 
Tinker remains available to try, and reported bugs are still being fixed. Its source code is public on GitHub.
Who built it
beginner was founded by Tyler Lindow, a software engineering leader for developer experience, platforms, and merchant and partner integrations, formerly at Affirm.