First off, this is wonderful! I love the style you've done this in, and all the little details. As a Canadian, I especially like the little gem in to bottom right! Having said that, there's one thing that's bothering me, since I'm weird about things like this. The walkways seem to be covered with loosely hung plastic sheeting and the people inside don't seem to be wearing helmets which means the area is probably full of air. So, since it looks like this is on the moon, I'd expect the plastic sheeting to actually be ballooning out, as the vacuum outside sucks at it. Again, wonderful piece of art and I don't mean to criticize, I'm just being a nerd.