This is rad! I've never heard of the Channel F. Looking at game screens, I dig the color palette and especially the light-gray background and hot pink sprites/text that you're also using! It's kind of surprising there hasn't been Fairchild Wumpus before, but I'm glad it's being corrected four decades later!
If you get the "fairly literal port" done, any chance you might mess around with it a bit from there?