How much is functional?
That's a complex question because there were (are) so many directions to go with it...
IIRC, I only implemented the "breeder" transformation, and I hadn't done everything with it that I wanted to (setting up a home base with a hive).
Shame. It's the one I'm most enjoying.
You can make your own copy of it on Perchance and start developing it. I didn't write a single line of code for Alien Slime Domination. I made a copy of someone's neighborhood sim, then made requests to Perchance's AI coding helper to have it make all the modifications.
If you want help making that happen, we can take this discussion over to the thread I made to discuss using Perchance to make "spicy" games:
https://hypnopics-collective.net/smf_forum/index.php?topic=25242.0