the tree doesn't look so much like a tree as it does a twig sticking out of the ground. It's just about as tall as your already tiny main character. Trees are big objects, some are over 100 feet tall. This one clocks in at about 5/6 feet, judging by its size proportional to your character. Try making it bigger and better. Give it a good shape, add some width to it so it's less of a twig. Give it some texture to show it's a tree. Look outside and study some trees to get a better understanding of their size, shape, and texture.