A detailed description of SpeedScript—including its shortcuts and some screenshots—might be enough for an AI prompt to generate code for a version that uses Curses.
Would this be easy to do?
Take this input and let Gemini 2.5. Pro write the code. (add the screenshots)
Maybe even let Gemini 2.5. Pro write a node/bash script to create the project and all files within it if you do just want to copy and paste one script) run it, create the project.
Open the folder in Cursor and run it. If you encounter bugs, let Cursor fix them.
Think you would be done in about 2h.
If you want to make it beautiful use Claude to improve on that side. Its the only AI that currently "gets" beauty.