Does anyone know how to mod this game? It's a great start, but it needs a basic gameplay loop. I recommend: consumable potions to refill lust (can be used on breeder or monsters) which can be purchased for orgasium, and ~three day blessings of x trait (purchased with favor) that let the breeder pass on that trait for those three days while in spirit mode. Other orgasium potions could be potions of x stat to temporarily buff them, with some having features like fertility will both buff fertility stat and hardcode a successful mating when next attempted, and breeding is possible even with sterile monsters while active. Other favor blessings (which could come in a consumable scroll so you could apply them to a monster instead of a breeder) might be a blessing to pass on other characteristics like a specific height, wild/human trait, or increase odds of a specific gender. Also add miscellaneous consumables like an item to permanently use a portal as an exit and temporarily (say, three days or so) use it as an entrance. Timers on the buffs and portal activation give incentive beyond the convenience to use potions for lust instead of just sleeping.
Add to this a permanent effect on the game world such as a random chance of running into monsters you've sold as vagrants (preferably in an area that makes sense based on the flavor text of who you sold it to) and maybe a mark spell/item that lets you set a few of your own portals per area that can only be activate with the temporary portal activation item. You could also make it so some potions are bought with specific fluids in addition to just orgasium so that those have more use besides monetary value and catching over level monsters. Other obvious stuff that may be more difficult to implement would include a shop for more clothes and cosmetic items, including some for specific monster types, and an area to buy rarer variants like butterflies, and mermaids (which should usually breed more common variants like bees etc, but have a small chance of breeding their own variant). These tweaks will reduce the grind, make gameplay over all more rewarding, and avoid the awkward late game period where favor and orgasium have no purpose but an arbitrary score count, and therefore the things you do to get them (like turning in breeding quests) feel somewhat pointless.