This map is actually quite fun. While it does not work with my proxy server (stupid old computer) my laptop covers it quite well. Some things you should think about are making the map itself a little more complicated. Don't make it so open. Fill it up. The open spaces make it hard to organize defenses against whatever may come at you while giving too much room to make it challenging at the same time. You should also consider making a more intricate trigger set up. Make it more fun.