At first...

First I wanted to give you a 7/10 and 3/5 for the level of complexity of the melody.
But then I saw "I like how this song brings a felling of despair as you cross a planet that has been utterly destroyed." That's really really good, when you feel something yourself while you listen to a melody you created, then you have my respect.

Knocked it up a notch 8/10 and 4/5