Pros:

- Good and unique concept
- Interresting level design
- Fun
- Possibility of building small structures to slow down the  horde

Cons:

- The last technologies are too long to unlock (35 seconds)
- We do not begin with a melee weapon in normal and superior difficulty

Conclusion:

The concept of this map is unique ! We must to unlock all technologies (weapons, medics, ammo...) at the computer to kill more easily zombies. (Council : unlock pipe bombs, melee weapon and smg quickly).  The goal is to build a rocket at the middle of the place to escape towards the moon. (Other council : you must be organized ! : 2 players on the computer and 2 others in defense).
Go to download this ! It's fun !