You need to edit this map. I started out as Gaia and when I went into editor to fix this, (save as player one?) it kicked me back into main menu. Can't play it like that.
For the above reasons, I did not give a decent playability rating. I couldn't play it.
As for balance, I gave you a low rating because two of the four TCs on the map have six large gold mines next to them and the one did not. (I didn't check the black player) That doesn't seem very fair, nor does the fact that most of the wood was off the cliffs. To fix this you can simply add some more gold on the cliffs, and insert some forest. A creative forest is best, but not necessary.
Creativity got the rating it did because the map didn't seem to have much in that regard. The defensive nature of the map was nice, but needed some work. I didn't see anything in the way of storyline or map design, so I gave you a low rating. Try something different, make one or two of them a Citadel instead of a TC. For example: As for the defensive thing...smooth out the paths going up the cliff, add a few different kinds of animal, gazelle, aurochs, boar, cattle, piggies, and so on. Goats are nice though. But generally, just mix it up a bit.
Map design: Didn't see much here. The map wasn't necessarily flat, but the grass and such was two types. But that's okay, I got a low score for such a thing on my first submitted map. :) Work on it a bit and you'll get better, add more trees, a river, You can start out with River Greek, and raise terrain so it becomes a creek, narrow and passable.
Also, use the tool 'smooth' It will greatly increase the visual appeal. Seeing deer walk up a vertical wall of grass can be quite disturbing.
Also, the players didn't seem to have an AI...
Story: I didn't see one. Nor did I see Instructions. It seemed more or less like a Random map. No objectives, or even a chat saying what needed done. You can even do something simple like 'Your enemy is attacking! Defend!' It'll likely get you a better rating than a one.
As for the random stuff... The additional points I should make...I thought that there were too many deer. Sure they stick around in large groups like that in reality, but in the game it can get kinda annoying. Also the title needs work. You shouldn't add a digit into a line of text. It should be 'One way in.'
If you can add a few more things make it so I can play the thing, instead of view the map after resigning...I'll play it and re-review it. Keep it up!
[Edited on 08/18/09 @ 12:42 AM]