Along with my other map, this is also unfinished. I couldn't think of a better name, so I just named it 'Arena'.

That's basically what it is. It's an arena that you can fight your friends in (any of the four squares on the second floor). If you are using a server or something, make sure you have command block outputs on, and since I forgot to do it in my world while editing, make sure you have '/gamerule keepInventory' on (I have cheats off, so just do open to lan with cheats on). This is just so that you can keep your items and your enemies won't steal them.