Hopefully youre also ok with someone who is basically doing their first critique outside of class lol. To start, I can see the line of action really clearly for every picture except for the last one, but that might just be me looking in too much into a casual pose. For the first 2 minute sketch, I can like feel the weight of the person's hips onto their legs, which was a good choice because it kind of helps create the pointing to the sky if that makes sense. Like it all comes together nicely for movement. Your page 2(30 second sketches) are also really identifiable and dynamic. The third page has some really lively or strong figures. The picture on the left on the third page seems to be really confident with their strength, because their shoulders are flat and parallel to the chin, like they are coolly leaping from the ground. The second picture has a really strong line of action with a lot of life in in the pose. The biggest thing I notice in the last picture is like I feel like you could establish more twist in the torso with the person. I feel like the drawing would feel more dynamic if you could see the contrast in direction of different parts of their body if that makes sense. Overall, you effectively showed movement and reasonable proportions in my eyes. I hope my critique is somewhat helpful to you, happy new years, and stay well!