Looks like fun! I don't have a Playdate (yet!). However, the included PDX file doesn't work on macOS in the Simulator on m-series ARM processors.
Hello! I don't think I'll be able to compile such a binary as I have a 2012 MacBook pro... Though I guess the build command would be pretty similar to the device ones. Also, TECHNICALLY it's against the simulator terms of use for me to recommend using it to run my stuff. Though I think this one would fall into a gray area cos it's really a development tool, not a game.