I'm trying to pin down why my card.png does not work. (I don't have hardware, but it ought to show up in the .pdx Finder icon on Mac, with spacebar/Quick Look, right? The Flippy Fish example shows its card that way.)
The docs say your pdxinfo imagePath can point to EITHER a single image, or a directory with specific contents.
To keep it simple, I'm using just a single 350x155 card file for now: "card.png" (no transparency) in root alongside pdxinfo. My pdxinfo is:
I'm still trying to get this to work (even for FlappyBird) - on Windows, I put FlappyBird pdx into PlaydateSDK/Disk/Games and the text shows the game is there, but still not sure where to see the card/etc. images, but it's no place I can find so far. I can't really explore to find out as I get into a 'you need to register' doom loop:
(and I can't register either, as described here):
So, I'm currently 0 for 2 (can't see any card/etc images, can't register the simulator).
I can see how that might not be obvious if you don't have a device full of games! The Home screen is a scrolling list of all your games (plus Settings), which starts out at zero games in the Simulator, until you add one or more pdx's.
I guess I knew from PD marketing vids that the Home screen is a list of cards, so I scrolled up/down with the D-Pad without considering how I knew to do that. (The crank works too.)
Placing a symlink in .../PlaydateSDK/Disk/Games has been very helpful, but I still couldn't get my card.png to appear in either the simulator or on a device until I realized that my pdxinfo file was not in my source folder, so my pdx contained a generic pdxinfo file that did not have an imagePath set.