Assuming that those are 8x8s, the depth seems plausible for the most part. I'm sick and don't remember how tall an 8x8 is but I'd recommend 9-12 bricks down? I do/don't agree with Wound too, the drops seem a little choppy; try experimenting with different slopes and see what looks better, because I think you could top that.
As for the rest of it, I'd trim the length to slightly more then half of what it is and the width more or less 3/4s. It just seems... Massive. But that's just me.
Hope to see more of this.