Hmm. How do I explain this...

To get through the map's various challenges, both teammates must cooperate to complete the various redstone puzzles, which often include a fair bit of timing and parkour. It's best with four players, but can be played with just two, playing as just one team.

I think the best way to think of this map is as like a dungeon in a Zelda game.
Except it's co-op. And you're racing against another team that can shoot you.

If any part of that sounds absolutely awesome to you, then you should probably just go ahead and download the map.

Additional Notes

If you're having an issue where arrows seem to fall straight down when fired, try reloading the map. The problem seems to happen on every first time the map is loaded after you open Minecraft. No idea why, sorry.