Not an SDK feature request per se, but I would really love if we could drag and drop several .pdx files (or zipped .pdx) at once on the Sideloading web page, I got my Playdate a couple days ago and it was pretty boring that I had to go through the process of : open file selector, select one game, upload, repeat for the 30+ games I wanted to sideload right away.
You can drag directly to the page no need to bring up a file selector. Much quicker.