@kat I agree that adding a shadow in the eyes and mouth to show that there is a back side of the pumpkin is a good step. Since you want to convey that a light source is in there you won't have to do anything really dark but some type of gradient would help it look finished. Good piece!
Thanks, @MissMarck! Good point about their relationship. I did some fiddling around with it before reading your comment and just saw it when I came to post an updated version. But I like the idea of more shrubbery or something between them. That's something to consider before going very much further with it.
Here's the update - not liking the big eye, though.
My wife and I saw a man drawing in the coffee shop at the bookstore today. I was happy and a little envious at the same time of his bravery. When my wife commented on his work he was thrilled to show off his sketchbook. It seemed to be just a fun hobby of his, but the man clearly enjoyed drawing people. It was encouraging to me, who wants to be a professional, to see a hobbyist in public just letting it rip. So go be encouraging to others as you get better and hone this craft. Who knows, it might get you a free coffee or nice illustration gig some day!
The angled board to the right of the ladder seems as if the bottom edge of the board should be showing. Also, group the tools and scrap wood together in fewer piles, but more in each, maybe 2 but no more than three groups. Right now, everything seems evenly spaced along the bottom. I like the idea of another kid in the scene, as suggested by @MirkaH, maybe one of them scratching their head in confusion. Do try to finish it. It has a lot of potential!