Ooh, hand drawn. I like that.

The experiment looks very good. I actually agree with Kaelin on almost every point, except for the water labeling, which I think is pretty cool. Do you plan to make the oceans completely black? That could look great. For the forest, drawing each tree individually would be an incredible feat, but an easier alternative that also might look better when more zoomed out could be to just outline the shape of the forest and add some fluffy or spiky texture, depending on tree type.

Also, your font looks great!