I love the tiling work, you leave no studs uncovered which is something I definitely could improve on with my work. The color scheme is very cohesive as well. I'm really glad the mech fit in, I tend to have to plan ahead in terms of spacial availability in my builds.
I like the design's smooth look, but the engines could be bigger and more detailed. A second pair of engines or fins at the back would also help balance it out.