Huffman+Base64 Sokoban Level Encoding Format
From Sokoban Wiki
Level Compression per Huffman-Encoding
1 - [ - ] Floor
01 - [ # ] Wall
0011 - [ $ ] Box
0010 - [ . ] Target
0001 - [\n ] NewLine
00000 - [ * ] Box on Target
000011 - [ @ ] Player
000010 - [ + ] Player on Target
/\
1 0
/ \
[-] /\
1 0
/ \
[#] /\
/ \
1 0
/ \
/ \
/\ /\
1 0 1 0
/ \ / \
[$] [.] [\n] /\
1 0
/ \
/\ [*]
1 0
/ \
[@] [+]
