In the Mine Shaft

 is the tenth level in Bloons Player Pack 1. In this level there is a Metal Block fence, only broken in Tile Blocks at the center, along with a Spikey Bloon in front of it. The player must use their dart to pop the Spikey Bloon and one of the Tile Blocks at the same time: thus, it requires a careful aim. If the dart does not pop a Tile Block, the Spikey Bloon will stop at the sixth Tile Block, failing the level.