Edit: Since more people commented on it, I decided to give an updated view on what I have done so far. The most common feedback was to add more trees, should I add more or is this a good amount?
Like Ducky said, if it’s a forest biome then there should definitely be more trees. Also, for low-poly maps, terrain is generally not used (bc it envokes a feel of realism), rather modeling the terrain in blender is done to get a smoother and more simple feel.
1.- Add more trees, if it´s a forest then it could probably use some more, If you don’t want the center so accumulated with trees then you could put them on the horizon and on the unreachable hills