Unless it's oddly intentional, I would think in a space occupied by both a creature and a treasure, the creature should take precedence as it can be a bit confusing why I'm being attacked by a pile of money.

Hi LordGek,

Thank you for the feedback. If I were right I think you are talking about treasure room,  currently there will be a chance that randomly creatures spawn in treasure rooms(rooms that full of money), but it's not guaranteed. Treasure rooms are designed to be relaxing.