joyrider ported his game Sokoban GP2x to the Dingoo! It bears minor changes to make it playable on the Dingoo (obviously!).

Sokoban GP2X is a remake of the classic sokoban game.You as the player need to push boxes to specific locations in the level. Once all boxes are pushed to the correct spots the level is finished.Sokoban GP2X is basically a sokoban engine, it contains all the game rules and has the ability to use level packs. It’s possible to create the level packs directly on the GP2X using the built in Level editor. Each level pack can also have customized graphics and menu colors. The game engine also has an undo system up to 1000 moves, and have custom 25 mod or ogg music files loaded up.

http://www.willemssoft.be/index.php?main=5&sub=37&action=productdetails&id=238