Sokoban 30th anniversary - niwa "sOkObAn"

The puzzles and remodels of "niwa" are always well received!

In the Sokoban Yahoo! Group has posted this puzzle, with this note: "This December it has been 30 years since Sokoban was first published. Here is my small contribution to mark the occation." 

The goals form the word "sOkObAn", and if you rotate the map 180º, you can observe that the initial arrangement of the boxes forms the same word.

        #####
        #   #
      ### . ###
      #  * *  #
  #####  *$*  #####
  #      * *  #   #
###$.*### * ###.$ ###
#  * $  #      * *  #
#  *.$  #####  *.$  #
#  $$*  #   #  .$*  #
###.. ### * ###  *###
  #   #  * *      #
  #####  *@*  #####
  #   #  * *  #   #
###*  ### * ### $$###
#  *.$      #  *..  #
#  .$*  #####  .$*  #
#  * *  #      . *  #
### .$### * ###*$.###
  #      * *  #   #
  #####  *.*  #####
      #  * *  #
      ### $ ###
        #   #
        #####

Author: niwa (2010)
Title: s-O-k-O-b-A-n
Date: 2012.12.1
URL: games.groups.yahoo.com/group/sokoban/message/4716