A little rough around the edges, but I really like the main game loop. I'm not sure buying extra planks does anything - it said I had four, but I could only use two. I also mistook the tiles most likely to cause a collapse with the ones that had treasure (the ones with the white rings) at first.
Edit: Oh, minor thing: selecting "Leave" in the Bank and Shop menus doesn't actually leave, you have to hit B.
But I like digging and exploring for goooooooold so this one was fun.