It hurts but spence is just being honest, brutally so, but I agree with him. Your picture really isn't all that good, and because it consists of made up characters, not much we can help you with.
I guess i would say make the river look more like water, not just a bunch of blue lines, add waves and such.
And i'll be honest to, this looks like it was made in less than 5 minutes, spend more time on your pieces and they'll look better and we won't have to tell you they suck