I think this is a decent map, helped by the MH and RA being basically on opposite ends. There's very little going on here though; the map is [plays] more like a long hallway than one would expect by the look. It just needs a little "more".
I do think the aesthetic choices of the stark grey contrasted by the bright yellow/orange and lava coloring really works well. And the sky is stunning for the 1.1 seconds you see it before you die. :D