Looks like a fine start. I think the mountains would look better with a more grayish color to them, and whiter for the snow caps. Also, - assuming this is supposed to be fairly earth-like planet - it would seem that the equator would be just below that large lake on the great eastern landmass. If so, is there a reason why there are so little forests on these latitudes? One would expect the tropics to be covered by much rainforest.
The best advice I can give you is to make the rivers (at least the most major ones) before placing the cities. Rivers are important because they provide fresh water (any decent-sized city will need a good source of water to sustain it's population), they act as natural barriers (hence often marking borders between kingdoms) but also provide a convenient way of transportation (if navigable, and especially in regions where roads are of poor quality).
The roads should be placed after the cities, since they mostly connect one city to another, or to some other important place (such as mines in the mountaints, an important temple or other holy place, a port-town by the sea shore, etc.)