Hello there! The only character whose proportions felt a bit off was the character in the back. The torso feels a bit too wide, but the arms are the ones that are too small; you need to make them a bit longer. :) Particularly the forearm, since the upper arm will be slightly foreshortened. You also need to show part of the arm holding the screen; otherwise... the connection between the arm and the body would look strange or nonexistent. I didn't have to correct much on the character in front. If anything, I would show a bit more of the character's right arm. :) It's a simple drawing, but I hope this helps!