Like my 1st scenario, Olaf's Mission, I've created this scenario: Erick's Quest. I've learned more about triggers and this scenario is realy better, so please download it and enjoy!
It's a very nice map design, but the game play is sadly lacking due to the absence of any instructions or objectives. Destroy everything you find has never been a great objective. To make objectives, try the Scenario > Objectives menu in the Editor, then use an Objective trigger to display them when you want them.
I didn't find it terribly balanced, either, with a huge army of siege weapons and myth units attacking your base before you even get started.
Due to the lack of objectives, there's no story either.