(on real hardware)
On your device, press and hold Left, the Menu button, and the Lock button for 3 seconds to start your Playdate in "disk mode".
Now, you can plug your Playdate into your computer via USB, and it will show up as an external drive.
Now, double click on the Data folder, then you should see a folder with playboy in the name.
Depending on how you installed the .pdx, it might be in the format "me.overflo.playboy", or
"user.1234.playboy"
If you don't see the folder in
Data, run Playboy on your device at least once to create it.
Paste your games into this folder. Make sure the files end in .gb - if they came
in a .zip file, unzip them first.
Add as many as you like, you'll be able to pick between them.
Games show up in Playboy named the same as the files in the data folder.
Give your .gb files useful names so that you'll recognise which game they are.
