Nice Start. I like the terrain, not too dull, not too "headache"-ish.
Here are tips:
-The first level you have is under "All Players". I suggest you put that trigger under a computer player. If you put it under "All Players", that trigger will fire once times the number of players in the game.(So if you have yourself, and 2 computers, it will create 3 dark archon every time.
-Don't put "created by:..." and other information too much. Nobody likes to look at that. I've seen so much maps that have like:
Created by:
Aim:
Msn:
ICQ:
Email:
Seriously, who's going to care about all that stuff. They may only care about the name because they want to know who created "such a great map". I guess popularity is an issue over Battle.net.
-Try to have something "different" in your bound. Don't make your bound the same as all the hundreds of bounds spread over Battle.net.(Maybe have a mini game at the corner of a map, but watch out, they might ruin your levels if you have waits)
So, how are you going to incorporate the "beep" into the map?
