There's a lot to like here. I love the Doom movement speed. The confined space and dim lighting are anxiety inducing. The treasure feels balanced (maybe it isnt idk, but it feels ok). The combat is very shallow and i could see you taking it one of two ways. Either lean into the horror vibe and make the monsters much stronger, possibly even one shotting the player, or brighten up the setting and focus on feedback and diversity in combat. If the enemies aren't going to be much of a threat, they should at least be fun to thwack around. If it were me, I'd try for the latter. Good game.