Such an amazing game. Everything looked good, everything sounded phenomenal, the gameplay was intuitive, and the puzzles were good too. I didn't have any issues with the difficulty curve, but it wasn't too easy either. I genuinely can't think of anything you could do to improve the game aside from the obvious add more levels after the jam. Adding more themed areas (possibly deeper into the mines, where more valuable resources are being mined) and musical themes to accompany those areas would be pretty cool too, but that's well outside the scope of a 48 hour jam.