Just test it in 1.8.7,and here just some bugs I found. (it is still a very good map, a bit short when the tricks are known :p)
The clock that checks for the map is too slow. If someone holds rightclick with the map, the command block clears it twice without interruption, so it will not give you the map the second time.
Moreover, clicking on the link doesn't work for me, because users are unable to trigger the objective. Maybe should you just add a command block with this to solve it : /scoreboard players enable @a trigger
Finally, somehow, I miss a tp in the "fall section" once and force to fly in order to continue the map. I don't know how I've done it, but just to let you know it is not impossible.
Please help! I'm in the room with the rules and the reset and play button. I press the play button, but it doesn't teleport me! the back to lobby link doesn't work either! I'm in Minecraft 1.7.4. Please respond!