Interesting.
This is good work with Pen and ink. I love the comic-book style, and how some of the picture leaks out of the frame (one of the best conventions of comics). However like J-qb said in your thread, it's difficult to distinguish the different shapes.
This is something I've struggled with myself - you can see evidence of that in one of my pen drawings. My advice to you is (I've recently tried this and it works perfectly) use thiner lines and lighter shading in the distance, then thicker lines and more dense shading in the foreground. This helps set up the perspective. In real life, we notice that he further something gets away, the less detail we see.
Give it a try, I look forward to how your art progresses. =)