Condensing every single resource, that you'd usually see in a dungeon crawler, into money is an interesting concept.
Overall this is really well designed: Somewhat complicated maps that reward you for exploring; Every enemy feels unique both from an audiovisual and gameplay perspective; well-balanced combat; the clear feeling of growth with each dungeon level; the unique renting system makes you actually pay attention and memorize the items. Combat controls took me a minute to understand but it turned out to be quite simple.
Congrats on making this game! It's really impressive given the timeframe.