Very respectable for a first map!
Compile time shouldn't take more than half an hour. For a full, final compile...
http://www.student.ru.nl/rvanhoorn/optimization.php try that tutorial and read it throughly. You've got some big optimization error here! This should also affect the map and probably makes it run worse for players, too!
Nice colors and brushwork, but try thinking of something a little more memorable for the theme!
A few general tips: Avoid dead ends (two or 3 ways out of every area), seperate larger parts from each other so the engine doesn't have to draw everything at once (performance!).
Good start! :smile: