I dislike the colours, they look dull, I would go for a dark-ish forest, or for a autumn forest, well, hmm I would also add a water area since it looks odd that the river starts from a random point. then I reccomend you to delete those weird cliff they just don't have a purpose to be there. You should think "would a random guy enjoy this map", that might help you with mapping, since in some parts you have just one tile to link to walk, and you are not considering enemies D:. this is my try, I don't reccomend you to use it, since if you will not improve that way: