I haven't fully beaten it yet, but so far very fun.
It says Game Boy controls does that mean this will be playable on Game Boy emulator?
Either way really fun game and well done from what I have played so far. I have the first pickax upgrade and 7 treasures.
Edit: I got to the ending. Pretty fun game concept. Well done for a game jam game too. I like the interpretation of "Old Gold" too.