As Spook stated, the map needs more paths. Not just to the flag, but in general. Also, you need to work on your visuals a bit to help make the map look more convincing. The walls are large, flat, and square, when they should look more like rocks. The trees look really fake (it's almost impossible to make good looking trees out of brushes, so it's best to just not have them at all). The colored tiles all over the tunnel are way too bright. I'd use a different texture and maybe have a small strip of them along the sides to indicate the colors. I like how the area above the tunnel looks, though.