Noppers Blokkade

Before you block that blocks out for different subjects, and who they could go through the tunnel, you have to destroy all the blocks that prevent them! Destroy will simply choose the color and see that it is better to blow up, but rather that more and then blow up, the more you destroy in the beginning, the easier it will be the end, do not forget that in the end can not be left at least one square, it is not acceptable!