Thank you Marijn for creating and maintaining CodeMirror 6. There was a learning to figuring out how the library worked, but once it clicked it was fantastic.
Here’s the game: https://boke.institute/
It’s a puzzle game where you try to edit documents in as few keystrokes as possible. It uses CodeMirror’s merge view to help with this. It’s free to play, I just made it as a side project. Any feedback is welcome.