@wion Ha! The purpose is to extract $25 from nostalgic thirty-something nerds who remember playing this game on an Apple II computer.
If you went to an American middle school in the 80s or early 90s, This was likely the only game allowed in the computer lab. So everyone played it at least once.
But, I'm happy to report that the game is still fun, all these years later.
Octodon is a nice general purpose instance.