This is solid! I think there's decent bit of variety between all of the tracks and conveys the story you're trying to tell well. I think I like Abandon Field the most - it does a really good job nailing an "eerie" feeling, but still maintains enough to be interesting to the ears. I'm going to echo the comments squirrel made about the dynamics and samples. I think some wider ranges of tempo between tracks would be a nice little boost as well.
Good work!