Hi there! Neat project! Can you give us a rundown of some of its features? Which processor are you using? Do you intend to sell these or are you only creating a prototype?
Not many features of note - it runs arbitrary lisp code, has a simple graphics interface. You can save and load code and data/text files to SD card.
The processor is the Ambiq Apollo3 Blue, which is really what makes running arbitrary code with such low power consumption possible. 48/96MHz, 384k of RAM. https://ambiq.com/apollo3-blue/
There's an Apollo4 which is faster and has way more memory, but it's a tiny BGA chip which doesn't have an Arduino core and I don't have the skills to work with that (yet ...)
I hope to create a PCB for it at least, it would make the device tiny and sleek and make it a lot easier for others to reproduce. But I haven't been able to learn PCB design yet.
One other thing, I don't see the stl/cad files for the case anywhere, I assume you're still iterating on that. Very cool project!