Hey great work! The art lovely! If the player hitbox were about half the size of a wall tile, navigation could be a lot smoother - especially in narrow passages. :^)
Potions might be better off as instant pickups - when surrounded in tight spaces it can be difficult to fight your way out if your weapon will get swapped out with an empty bottle instead of attacking :P
Really appreciate the systems at work though; mobs, loot, progression, animated text - very satisfying.