From the summary "This Playdate project can be run on device or on the Windows or Linux simulators".Mac OS is unsupported because I don't have one to test on.
Interesting. I copied the pdx directly to the Playdate via Disk mode and now it works. Great work – it's beautiful!
Glad to see you could at least get it working on device. If I ever get a Mac, I'll start producing MacOS simulator builds of my projects too.