I guess you mean this one:
http://handdrawngames.com/DesktopTD/Game.asp

It might be possible to find the flash with wireshark.
The game itself is not saved to /tmp

I looked at the source from the website but the flashfile I could download stopped loading at some point.

Seems as if the game can only be loaded from "same domain".

Any flash PRO around here? I would love to see this game as file on my N900 *G*

Cheers
Bjoern