It's been a long, long, LONG time since I last touched this code. Someone was recently asking for the binaries so they could play the game on their vintage Palm Pilot device, so I took the time to get an environment up and update things (mostly images) so that it would build again.
For those who happen to have an appropriate device, here are the resulting binaries! One (hercule.prc) is for monochrome devices, and the other (hercule_c.prc) is for color.
These are the unlocked, full versions, not the limited shareware versions. No need to send money, though I'll never complain about a few bucks Paypal'ed to jamis@jamisbuck.org. :)
Enjoy!