Love the colours
love the coastline
love the labelling
LOVE the mountains (so good to see a new variation, I think I'll have to remember these!)
less convinced by the trees (though I'm struggling to suggest what you could do with them instead. I think they look too regular. I know the mountains are made of repeating patterns, but it's actually not that obvious unless you look for it - maybe make a few handdrawn sections of forest to lay together to match the mountain style and make it less regular?)
and yes, there are some river issues, but far better minds than mine have pointed this out

All in all, I really like this, and I can't wait to see what you do with it...