Out of This World Minecraft 1.9 Adventure Map

What wou you do if the world was suddenly turned upside down? Dig up, duhh! When you start the map, you had been chopping down a tree. But the world was turned upside down! You have to dig up (or down, since you're upside down!), and reach the void. Upon reaching the void and flying out of the world, you find the person responsible for this! You have to fight him, but if you're not quick enough, he'll change his gear and regain his health (Every 10 seconds)!