Well, try working more on the maps. Do not rush maps.
You should have used more boxes. Why is there snowy boxes indoors. The snow needs displacements. The inside needs better textures and lighting.
All of it needs a lot more detail. It needs a 3d skybox.
There is so much you missed out in this map. DONT RUSH YOUR MAPS!!
Also on the rating I see you dont have any thing on how it looks.