Hi guys, as I promised more than one year ago here is Cybersaurus, a new game for the Zodiac. You can find screenshots and a working demo at http://www.darxun.com/cbs.htm.
P.S.:
The game is made for newer PalmOS devices with 400 Mhz processors, but if you tweak the options it can run on the Zodiac at 480x320 as well. Deactivate the background in the options and reduce the view depth in order to get a decent frame reate.