This is the dungeon crawler i was talking about, i was able to get this up after a few hours, you'll need to manage sanity, which drops if you're in the dark, sanity will cause even benign enemies to be more scary/dangerous when it drops too low, if you get 0 sanity and 0 health its game over, but if you keep your sanity above 0, and you get low health, you will pass out and leave the dungeon.
To keep yourself from going insane you'll need to pick up oil charges for your torch, which become more and more rare every level, there's 1 safe zone after every 5 levels, so 3 in total, the first will heal you and charge your torch but get progressively weaker as you go deeper.