This was fun! I liked the aesthetic, and the grind turned into quite the addictive loop.
I may have soft-locked myself though? I'm not sure if the game has an end, but I got to a point where I wasn't able to finish upgrading and the knight still refused to go to the castle. There was also a point where I skipped talking to the guy in the mine and grabbed the pickaxe - but it seems like he doesn't say anything anyway?
All-in-all, it was a good experience, and I enjoyed playing it!