This has an interesting layout. Unfortunately, it's held back by repetitive textures, and a lack of a sky box. The repeating textures can become disorienting to the players, and the enclosed box with no sky seems to bland the whole map out. With this layout, there are many different themes you could apply to this map, to give it a more pleasing look.

You could retexture the buildings and walls to look a little tropical, add in a nice sky, and make some sand on the floor. Make a tropical island, keeping the same layout.