hey i know that tower form one of ya older works ;)
to the picitself: seems like you rushed it to release this pic. your paints in the roads and the river stick out too much. the red-brownish edge at the lower corner (its the roof of a house isnt it?) also has to be done better. a bit more work would be good, so that i the viewer has the feeling, wow it looks like painted without seeing how theeffect was done ^^ (only if he takes a closer view it should be seen). the tower itselfdoesnt look bad but the "head" of the tower doesnt look that shaped. other than that the tower shows exactly what i mean with: the whole pic looks like fully painted ^^.
looking for the finished version :).