Good points: Interesting at start under attack from King's men.Adds a little worry to scenario.The Glade for ambushing that was a good original idea i don't think i've seen before if this could be fully implemented it could become really good!good job.
Big Improvements to be made: Chat text's i know u can do it as u did later on in the scenario :) Objectives screen would be really good like "Capture the Trade Cart" or after escaping " Find nearby help "the town center and mill would be good if u set they're civilsation to Castle age as dark age really doesn't fit with Longbowman.
Subtle Changes: Adding flowers 1-4 and some flower bed's would keep the scenario looking nice,no one likes to really look at a blank grass and tree's you can add flower's by going to "Units then clicking Gaia" then clicking other then just list down till u see flowers.A few deer and/or forage bushes might be a nice addition too.
My thoughts: A good 1st scenario that with some changes made to it and possibly a few more task's would be good.Overall not a bad piece of work and I hope to see more of u're work in the future. Just remember to make scenarios longer!:)