You can download the game here. It is available in two versions: simple cards (easy on your ink/toner) in PDF format and full graphic cards (with images) in zipped GIF format.
Base Set (Simple) (PDF format; 25.3 KB)
Base Set (Graphic) (ZIP format; 6.75 MB)
Expansion (Simple) (PDF format; 6.06 KB)
Expansion (Graphic) (ZIP format; 426 KB)