I haven't seen this puzzle game before, I had to read into it a bit (and had to actually cheat a bit, via solve_puzzles.py.)
Works fine out of the box with python 3, no extra libraries required.
This is good enough to submit to PyPI. Seems like a nice terminal game. Something to play in a tmux pane while tests are running or while waking up with a coffee.
Also I looked at the code, it looks fine.
I saw the multiprocessing in generate_puzzles. Wow. I don't even know what Thread.starmap does. This works nicely.
Keep it up!
I've listed some ideas if anyone would like to add their thoughts, feedback, bugs - either here as comments, or at the repository issues page.
In this puzzle game, you have to build words using the letters in the hexagonal shape. Each word must be at least 4 letters and include the center letter. Letters can be used more than once. Each puzzle includes one "pangram", which uses all 7 letters at least once.