I did not last long after leaving town and meeting your frogs.
Congratulations! Since 1979, nearly 50% of all parties of level 1 characters have been killed by the Frogs. This is a time-honored tradition. Create more characters. Persistence is key.
Sounds really interesting! I remember think that this module had some unique critters - like the giant tick. (Okay, I can't remember any others.) I think that there were giant lizards and giant toads, too. We may need some icons! But I'm curious to see if you put in those critters anyway...
If you build a Giant Tick icon, I will update the monster database to include it. In the meantime, I found a suitable stand-in for the Tick. It swallows characters whole. Your Giant Crayfish makes an appearance in a supporting role.
There is one aspect though that stroke me right at the beginning and can probably easily be "corrected": The time used with each step in the overland map showing the village is still set to several hours (as would be reasonable for overland maps depicting huge areas).
I was using the default setting. At your suggestion, I have gone into the Global Settings and changed the time on the Overland Map to be 1 minute, just as it is in a Dungeon. Time is of no importance in this module. There are no rest restrictions. If you rest inside the Dungeon for 72 days, you can pretend that you returned to town and bought a room at the Inn before doing so.