In this folder there is a swars.zip (8kb zipped) which unzips to SPACE.LSP and SPACE.DWG
It is a game to play in AutoCad.
SPACE.txt Here is the program in text format to view direct on-screen. It is exceptionally well commented as if the author intended to provide Autolisp instruction.
If you copy this SPACE.txt file by whatever means rather tha downloading the zipped files, ensure the copy you put in your AutoCad Support folder has the extension changed to .LSP
Here is a accumulated summary of what I have learned looking at he code and comments.