The File Menu

File->XSokoban Levels
File->Sasquatch
File->Mas Sasquatch
File->Sasquatch III
File->Sasquatch IV
File->Sasquatch V
File->Sasquatch VI
Open the indicated level set, at the first unsolved level (or the first level if they've all been solved).
File->Open level set (O)
Lets you open a text file specifying a level set. Once you open a file that CPSokoban has not seen before, an entry for it will be added to the file menu just above this one, and it will be treated the same way as the level sets distributed with CPSokoban. (If you want to remove the entry, delete or rename the file, and choose its entry in the file menu. You will be given the option of erasing information about the level set from the score file.) A large collection of level sets is maintained by Scott Lindhurst. The format of these files is described in the section XSB Files.
File->Quit (Q)
Exit CPSokoban.