While I couldn't find detailed information on the game's mechanics, it's likely that Mage Kanade--39-s Futanari Dungeon features:
The dungeon was a marvel of mysterious architecture, with rooms that seemed to shift and corridors that disappeared into nowhere. Kanade encountered a variety of challenges: she battled shadow creatures with her arcane spells, solved puzzles that required her divine magic, and navigated through illusions that tested her wit and courage. UPD Download FILE Mage Kanade--39-s Futanari Dungeon