Here is a minesweeper game that I've made for the a320.
The controls are:
 - The D-Pad moves the cursor.
 - A uncovers a tile.
 - B marks a tile.
 - Select takes a screenshot.
 - Start exits.
The source code is also available here: http://flatmush.juliusparishy.com/a320/MineSweeper_Source.zip

This is probably more use as an example of how to make applications without using the s2dsdk, it contains enough functions to get anybody started in a320 programming without all the useless bloated sdk code.