His levels are available at http://www.ne.jp/asahi/ai/yoshio/sokoban/main.htm.

SOURCE

http://www.buildxpda.com/pocket_boxworld.html

Reviews:

* [Feb 22, 2006] by dude using veiwsonic v37
Yo box man is better than this and u can pick ur start level and there are no bugs play it!

**** [Feb 16, 2005] by Ricky using Pocket PC
Very addictive gets harder good challange.

*** [Aug 18, 2004] by felix leung using auas 716
It does not save the current game. If you start the new game, you start on level one again. Too frustration.

***** [Sep 8, 2003] by Jeff using Viewsonic V35
Great version of a classic game. There's a bug with the Undo Move feature if you change your location after moving a block. It would be nice if there was a way to pick the level you want to start on.