Creating a Picross plugin

[Nathan Korth]

My new Sansa Clip Zip (although it is awesome) has too small of a screen to play Mario's Picross in Rockboy, so I'm going to try coding a Picross plugin for Rockbox. I have a few questions:

1. Does anyone else out there play Picross? (Just out of curiosity -- I'll still code it even if I'm the only one who uses it!)
2. I'm going to make a .picross file format for puzzles, so should this be a viewer or a game (or both)?
3. I'm debating between two layouts:
    a) the numbers for the current row/column are shown along the left and top edges, and the board scrolls in the remaining space
    b) the numbers are arranged on the sides of the grid like pencil&paper Picross, and the entire thing scrolls fullscreen
    Which do you think would work better? B would certainly be easier to code

[Chronon]

1) I've never played it, but I like puzzle games.
2) It should be able to be run as a normal plugin, otherwise how do you start playing the game without a pre-existing file?  Making it both a plugin and a viewer is probably a good idea, but you could also handle file loading within the plugin once the plugin is loaded.
3) No comment.