Nice setup. The organization of the mountains realistically suggests their being derived from actual geological activity, and the grouping of the forests suggests either moist lowlands or their being eaten down by encroaching civilization (hence the tendency for few small patches and the way the section on the southwest of bäkoi and the southeast of the map seem to indent slightly at the rivers. Just my assumptions though, more than actual knowledge in such things). I'm a bit curious why the forests are predominantly north and slightly west of the highlands/mountains on the island but south and east-ish on the lower left side of the map. I'd assume the prevailing winds would tend to drop most rainfall on one side or the other, consistent across the region, though since I don't actually know how tall those mountains are or the extent of the spread of deforesting civilizations or other environmental factors, I really can't tell if that's natural or not. Overall, a very believable map.