It's an excellent rendition of the style (and it's a pretty style). One suggestion I might make is that your mountain chains are a little straight in places. The one just below center towards the right is about as straight as I would expect mountains to be; the one just above-left of center is much straighter than I might expect. Then again, mountains vary widely, and it's tough to make much in the way of judgements without a good scale on the map.