You earn lots of blocks.
Firstly you need to dig out the way that will lead you back to your house. That same path will also be used by the wondering minecraft monsters. The longer you dig, the more resources you acquire. The more twisted the path is, the longer it takes for the monsters to reach you. With 4 dispenser boxes to buy, and 4 pixelated traps to use - all in which can be upgraded, only you can defend your house in the Minecraft Tower Defense!