"Supaplex.zip" is based on the following tarball:

      http://www.artsoft.org/RELEASES/unix/rocksndiamonds/levels/\
rockslevels-sp-1.0.tar.gz

Changes:

(a) The top-level directory component "levels" has been dropped.  Dir-
ectory entries now start one level lower.

(b) The group and owner numbers have been set to zero for all items.