Thank you for such long review and the whole video. Yeah, I just wanted to implement this idea even though it barely fits "Mountain" theme. To the time MicroJam has ended this game was even less completed, so to do this we participated in one more GameJam whose assets we used (not background only but character as well, I just didn't know how to send there more than one link).
Thank you for some advises. Maybe I will do some improvements someday, I'm not sure.
No, blocks that appear on ladders or not appear where they suppose isn't feature, it's a bug. If I fix the game one day I will comletely rework digging system because of how bad it works.
And I forgot to inform players that there's "Return to Surface" button that can help if they're stuck. However it would remove all of their items. This one was intended this way.