Are those circles with the cross in them supposed to be crosshairs?
If it was me I would take a look at making those a little more realistic, or more common like you see in video games today (thicker lines, abient glow, whatever but they need to pop) and then review those with the total composition.
Also, is there something you can use other than solid black lines as separators? Like a piece of torn cloth or a line that has more irregularity to it or something. It just seems like the first solution that came to mind.