It's obtuse to say the least.
There isn't any game design documentation nor API/coding documentation to speak of. Aside from the rules, there is a small file explaining to the GM how to process turns.
The codebase is reasonably well architectured, as well as an old C codebase can be. It is fairly highly coupled, lacking inline documentation, which makes refactoring quite difficult. As someone who had never played the game, and therefore was quite unfamiliar with the rules (I should have played as well as GMed), tinkering was difficult.
One improvement that could definitely be made is to automate the turn processing, but there are bugs (unfortunately I don't remember the details) that make turn processing an error prone process that requires manual intervention
If people enjoyed the FH rules, that is the game itself, and think its worth improving (bug fixing, modernizing the UI, etc), I'd be willing to help do so. But there would have to be some interest in doing so
Personally, I'd love to see an
active, open source, sci-fi themed, PBEM.