This is an interesting game. I like the pixel art, the music is nice, and the concept is interesting too! There are a few things that I don't really understand, but generally, it's not bad!
For some comments, I'd say it is really difficult to understand how cave collapsing works, and in a game like this where you have limited gold to buy from, you would really want to know how stuff works in order to optimise play. The same can be said about the torch too.
But anyway, this is a nice entry and a calm experience for me. Keep up the good work!