alright beat it, its very meditative.
is it just me or the further away from the entrance you are the more ore you collect?
for me the upgrades didn't feel worth it for the most part, imho they should have had a bigger bonus and smaller cost.
also it feels like the mining timing slider isn't completely accurate. Like only the first half of the notch seems like the real notch... very hard to describe what i mean.
would have been nice to keep playing the minigame after the first fail, or terminate it completely after a fail.