Friend of Exilian James Holloway used the Cepheida monster generation rules as the basis for the most recent episode of his podcast Monster Man! He created some plains biome monsters which seemed pretty cool, and I think it's a nice example of how the generative world-building in the game can go.
You can listen at either of the links below:
https://monsterman.libsyn.com/special-episode-science-fiction-monster-roulette (https://monsterman.libsyn.com/special-episode-science-fiction-monster-roulette)
https://www.patreon.com/posts/special-episode-110834426 (https://www.patreon.com/posts/special-episode-110834426)