I built a dependency/package manager for Playdate: GitHub - jm/toybox: A dependency management system for Lua on the Playdate. Just got the binary releases up (accessible at Release First release! · jm/toybox · GitHub) so I hope folks can give it a spin. I'm working on getting it published in package managers etc so it's easier to upgrade.
I also published a repo of examples for things that don't currently have single file examples so that they have focused example scripts to learn from: GitHub - jm/playdate_examples: Examples for the Playdate SDK I'll be adding to this as I experiment with more of the APIs for sure. 