Not bad so far. The rivers and coastlines seem very well detailed, but the mountains on the other hand seem "shorthanded," and just indicate that they are there at all. You might consider eventually adding some detail.
Your rivers all seem to be behaving, as far as I can tell. Someone from the River Police can confirm.
I think your mountain ranges are fine too, though I am not entirely sure about the smaller clusters near the western edge. I know that ranges often roughly parallel coast lines. I can't tell whether they are doing this or not, as the map doesn't include the rest of the continent. I'd be inclined to give you the benefit of the doubt, though.
Is the final map going to be hand-drawn like this, or are you going to enhance it with something like photoshop or GIMP?