OK, since you've posted a handful of pieces, I'm going to take my time to absorb the art and formulate my thoughts.
For starters though, here're my thoughts on:
- I like the overall layout. It feels balanced, a solid design for the page.... the eyes lead straight to the character, though the background components do compete for attention.
- The shading on your background and foreground are somewhat melding together. I think it would be a better choice to have the darkness of the background on the lower half, and the lightness on the upper half, behind the character -- this way, the character will stand out more....... but overall, the lighting in the scene doesn't seem entirely consistent... though, your choice of blacks and whites could've been more on a design factor, it's also important to match up to real-world physics as best as possible.
- If your character and background have to have these levels of blacks, then you should think of more creative ways of distributing the blacks.... for instance, if your foreground character carries these solid blacks, then your bg should have more varying details and the blacks should be more spread about, along with angles used to lead the eye around the page, and back to the character.... it's important for a scene to have a visual flow to it.... Also, it's important to vary your line weights between foreground and bg more -- generally using thicker line weights for profiles of anything closer to the camera, and thinner as the distance travels farther.... which you are doing in this, except that the thickness of the profile blends in with the darkness of the bg around the upper part of his body, and so it no longer separates him from the bg, it closes them in together. Focus on these areas will help establish more visual depth in the scene, so the fg and bg do not compete for attention and collide in space.
- The rope doesn't feel like rope, or carry the action of what the rope would be doing in the scene... it feels more like cable or rubber... it just seems a bit limp and inactive.
- The character's pose and proportions are over all nice, but I'm uncertain what he's doing at this angle on the character and city behind him. It seems like he's falling backwards, but with the rope, it kinda seems like he's swinging higher, but his pose doesn't reflect the motion of a swing like that... portraying poses in action isn't something that's necessarily easy to grasp... most seasoned pros deal with the challenges daily... but definitely something to focus on, otherwise a scene gets too static, even though it's meant as an action scene. A character like this seems like he's more so flying or levitating in the scene, not swinging or moving.
- As with all artists, focus as much as you can on learning more in your understanding of perspective, structure, anatomy and proportion. Once you have a better grasp on these, your placement of blacks and line weights will improve naturally.
- Over all, I like the simplicity and confidence in the line-work. It's clean and communicates. The style is nice...
I could go on and on..... I've always got endless thoughts and opinions when it comes to visual art, but I think these are enough for you to mull over.... Plus, I've still got the other images to critique
And I'll get to those, bit by bit.
Plus, it's been a long day.... so, I'll post more crit tomorrow.