A minimap would be nice, just to know which rooms are unexplored and maybe if the ladder was behind a pillar I missed.
In addition, enemy attack hitboxes feel rather large. In order to win a melee fight without being hit, it feels like you have to be constantly retreating or kiting. More attack variation, parrying, or smaller hitboxes are some things that could remedy this. At the same time, it doesn't really feel like there's a point to getting in combat in the first place except to get ammo for more combat.