What Jaythorpe said, but with some additions
- The textures at the bottom appear to be rushed, this takes away from the value of the map as a whole. Make them better.
-There is no localised spawn point it would appear. It would be better if you were to make some form of centeral alcove from which people spawned each time so that you can get an idea of where you are. Where you spawn now seems to distant.
- Do somthing other than quadrilaterals, like a hexagon maybe or a triangle. Rectangles and squares get boring.