The Moon is the second World in Mr. Mine. After digging to a depth of 1,000 km on Earth, you reach the bottom surface of the Earth. Then, there is a 32 km region of air and space, which you progress pretty fast through before reaching the surface of the Moon at a total depth of 1,032 km. The Moon starts from 1032km till 1782km.
Also, a new planet is coming soon! It is still a work in progress though and hopefully coming to Mr Mine soon!
Any guesses of what the new planet is going to be?? The world after the Moon is called Titan.