Nice draw, great story and some nice details. So yeah as mentioned proportions are the only real issues here aside from some little perspective problems. Like for starters im not entirely sure if the hill behind those guys is a hill, a rock or a mountain. This is kinda down to a lack of clear perspective, which becomes more obvious if we look in the foreground. If it is indeed a rock, due to the angle at which the rock has been drawn, the slope of the rock seems very steep. To fix this id recommend widening out the base of the rock, which would naturally occur due to foreshortening for a rock with what i assume is intended to be a less steep slope( oh and probably make the vanishing point flat too, maybe with a ruler?). Only other problem you've got is depth, which is extremely hard to achieve with pencil, only thing i could recommend with this medium is making the foreground values a bit darker/make them stand out compared to the background values through some greater line thickness on the characters and body bag. As for proportions, only tip i can give is study bodies and how they move, maybe look for similar poses online before you start a draw and see the way bodies and limbs move for the pose you want. Other than that, nice draw, your improvement can be seen with each drawing!
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