Well, I've been following the game's development since version 030.1. The game very unique and very enjoyable to play. It sure is very promising, even though it's in a phase of 30-40% of the full content (I think)
I have some suggestions: pregnancy with multiple babies, postpartum lactation, a breast/penis growth potion (I know there is a mushroom that increases the breasts and penis, but this potion would gradually increase and the end result would be considerably larger breasts and penis), prostitution to earn golden mushrooms (in-game currency) or/and items (in sex, your character can eat or be eaten), extra slot for intimate parts cosmetics (for example, to pierce breasts or pussy) and stores around that sell loot (of clothes, mushrooms that give powers and weapons, for example).
There will be places to buy clothing afaik. The intimate part cosmetics are also a thing, Mofu simply hasn't added items yet. Also about the prostitution part, I'm not sure if that would be a good idea because the game is not about administration, it's about collecting loot from enemies you fight.
Also it's a bit hard to say how much is done by now. A lot of people have been making a lot of requests and the game is currently demanding CGs more than sprites