I had to Google it: PDX is the airport code for Portland International Airport. I too thought of Playdate executable when I read it.

It's this sort of stuff that I think will make the Playdate a huge hit with a particular market. I'm not sure it's going to take off in a huge way, but it's almost already a "cult classic".

I didn’t make that connection! (P)lay(d)ate E(x)ecutable is what I thought.