Moodboard for the Game Environment

When I imagine the world of the game, I visualize a dark Gothic environment with a fantasy style to it. I was inspired by Tim Burton's art style. I want to create a game that has an eerie feel to it but is enchanting at the same time. The world of the game is set underground so I want a lot of natural elements to it but also some bizarre mutated assets that have appeared because of the mad scientists experiments.