A new update was added not long ago that allows you to fight the Purple Mushroom Boss. You can also check the bestiary tab and find alt portrait pictures of the little dark elf that includes an erect and cumming picture of her.
Version 0.034 will add the new CG scene and expanded story, as well as being able to collect the semen from the little dark elf for the semen collection quest.
The minotaur/centaur character will be added in a later update, after the Tiger Girl and Blue Mushroom Girl.