You nailed the aesthetic, however the technical execution feels sloppy. Your colors and framing are all very good, proportions, etc, but everything feels like it was thrown together in a rush. I'd love to see how something like this would look with smoother brush strokes and more detail. As a concept piece though you've done very well, keep it up :)

Pretty cool for something scenic, could have used a bit more of some defining in the terrain, so I can tell apart the scenery, and some stuff could have been shaped better, preferably the mountains.