Playability: This was playable but boring. It was not interesting and there were to low objectives. Everything could be completed very fast. 1
Balance: This was far to easy, for your force was of several cavalry archers, a monk and missionary, and a teutonic knight called batman. There were 7 other players on the map, 6 of them were your allies. The only enemy you had to destroy had a town center, and some villagers. You had a big navy defending your docks, but defend them from what? No challenge, thus a one will be given. 1
Creativity: This scenario contains four triggers. After you had destroyed the enemy you had to build a mill and farms and you won. 1
Map Design: Here a one should be given for there is no elevation and everything is complete grass 1, and some water. The other players had random buildings and units spreaded around. The own town had some nice stuff - good use of gaia objects. The half of the grass part is filled with mountains. This, and the players town design is enough to raise the score. 2
Story/Instructions: There was no story in here, no message expect the chats what are beeing sent during the 4 triggers. 1
Additional Comments: Tell you what, spending three hours on a scenario is nothing. Expierienced designers spend several weeks or month's, some (crazy) ones even years.
Have you downloaded some high rated scenario's? If you haven´t, do it. It would really help you.
Also look in the FAQ's for some tipps, or search up scenario designing videos on youtube.
EDIT: I also think that this could be done in 10 minutes.
In Closing - I would not recommend to download this.