This is a shockingly well-crafted game! Probably my favorite I've played in this game jam so far, even though I think it could use some work.
I had tons of fun running around the caves and learning all the systems you put together. The UI is implemented so seamlessly, and the simple animations are perfect. It's a game that's just very easy to sink long periods of time into. And I actually enjoy the simple "bumping" combat quite a bit. It reminds me of a game called Loot Rascals, which I'd highly recommend checking out if you haven't already.
I do have a couple questions. The biggest one is what is the point of using the pick axe to remove the walls? Since gold is the main currency here, I figured you could somehow find gold by "mining" in the cave, but it never happened for me that I could tell. Also, is it just me or do the equipment and health potions seem ridiculously expensive? For the tiny amounts of gold I was picking up off of enemies, I couldn't imagine affording even the cheapest of armor. Lastly, I couldn't tell if there was a "goal" to this game. Am I trying to reach a certain depth in the cave? Am I looking for something? Trying to kill something? It would be great to know where I'm going and why.
The more I like something, the more feedback I tend to have for it. :) I hope you keep working on this game!