Very complete little game. At the beginning, I didn't understand that you could mine upwards and downwards. I thought there were some areas that couldn't be passed through. The skeleton monsters were a bit scary. The rock attacks weren't as effective as the bomb. I died 5-6 times repeatedly. I probably haven't explored all the content. I never went to the up store. I find the boss. I didn't kill him and then ran to the right side and it ended. Good game.