Playability/Balance: 3.5
Finally a good map! This map guarantees much more fun than the others in the series, I like fighting off invasions while collecting the goods. However my tactic worked here too good. I've gathered a lot of stones by destroying the inner wall, and I've produced 200 breads in less than two minutes! There were no problem with the invasions too. I've sold iron and apple to make money, then I've bought a lot of bows and trained ~70 archers. After it the mission became very boring, they had slaughtered all the enemies with ease. Only the first invasion caused little problem as I had only 10 archers then. But the last two invasions hadn't even reached the gate.
Creativity: 3
An eco-vasion mission is always a good idea, personally I like those the best. But in the lack of challenge I can only give it a 3. Try adding more events, like fire, plague to make the mission more interesting.
Map Design: 3
Was better than the others, but you still rushed it, don't be in hurry with your maps, you can upload them every time to SHH, just take your time and make the best you can! ;)
Story/Instructions: 2.5
A nice story, which explains the situation, but it's very short. Try to write at least a 250 words. That may raise to score to 3, if it's interesting then 3.5. With instructions/hints/tips and a much longer story the score would be 4. ;)