I guess some people don't like the zooming option, while others want to see the whole board, or both!
I personally have no problem with zooming in, because the top screen accommodates the whole board, while I'm getting detail and input at the bottom.
Anybody with problems with their M3 Simply / R4 with Picross, consider defragging your card (by removing all the files, formatting, and putting the files back)
also make sure the main loader (.dat file) is up to date.
The best option is to buy the actual game, it's guaranteed to work! I promise that, because it works for me 100%!