pkg://zombies-1.0nb2.tgz:15207/+DESC  downloads

The idea of zombies is to kill as many zombies as possible.  Fortunately
for you, zombies can only move diagonally.  Once all the zombies on a
level die you start a new level, with even more zombies than before.

Homepage:
http://www.thistledown.com.au/software/