This is a fantastic first piece, its got a lot of character and compass/typography elements are great. I'm not a fan of the mountains and trees however, they are very harsh, and their a great number of duplicates which take away from the organic feel. You might try to reduce the Opacity of the brush you are using to about 75%, and mix up the brushes themselves so the mountains look varied and interesting. Black can work, but works against you in the top right hand corner becasue f the that very light burst. A dark brown is a good alternative. Just my 2 cents

~Jared