You have a very energetic artstyle that you use very well! You also have a good sense of composition, which you use to make a few amazing shots like when the man is crumpled into a ball. That scene in particular was amazing. However, I think you could really improve by adding some lighter values. I felt that a lot of the panels were too dark, and it was hard to tell what was happening. Some grey values would help, as opposed to the dark parts being completely black. Also, since you did this traditionally, it would transition better to a digital format if you edited the page scans a bit. When I post my art to instagram, I usually up the contrast and make sure I take the picture in good, bright light. It may help your manga look cleaner, more appealing, and more professional. You are certainly heading in the right direction with this, I hope you keep it up!!