hmm... the texture looks like a good choice for a mountain theme. however, it seems a bit open in the middle. lol, its also very inviting for spraying, barretarding, and nades rolling down the hill. the layout is good, with the building, the ravine, and the bunker and all, but some things could be improved.
like, that random moon is just up there. it doesnt look like night, and if it were then make some clouds to really portray that feeling. also, it needs shading/coloring (search for shading either here or like at SML or something). do that, plus a bit more scenery, maybe a tunnel/second route of some kind, and other minor touchups, and you'll have good map!