Saves don't work for me. Whether I select a new game using Rompicker or close and restart the app, no save files are created.
Saving now works. What I'd still like to see is the option to freely swap the Start and B button (or the A button). That way, you could assign either the A or B button to the Crank and the Start to a button. The reason for this is Pokemon Pinball, which was controlled using the Start button on the Mini. However, that doesn't work well with the Crank.