Here's a link to a working version of the game:
https://web.archive.org/web/20100118091431/http://www.engineering.com:80/GamesPuzzles/EngCen_Games/DynamicSystems.aspx
Direct file link: http://games.engineering.com/dynamicsystems/ds.swf
Archived direct file link: https://web.archive.org/web/20170113181230/http://games.engineering.com/dynamicsystems/ds.swf