Addictive progression system, good art style. The random cave generation felt very natural and organic. And there's enough variety to not become boring too quickly.
Some feedback: Firstly, I wish I could have purchased bombs. Secondly, I would have liked to know the breakdown of how much each mineable item sold for, so that I could prioritize which ores to go after. Lastly, I don't know if I just didn't find it in a chest or something, but an upgradeable flashlight would have been a welcome addition.
All in all, great game.