The branches of the tree are too repetitive and fork out in multiples of two on each branch, which makes them seem somewhat unnatural. The lines for the bark are too perfect, long, and straight. The overall composition and positioning of the tree is good, though.
Even now, I tend to draw/paint in figurative fashions, depicting subjects in my own manner. I understand what you're saying, but I wasn't necessarily going for a realistic look with the tree. Thank you for the comment though! ^^
The sense of isolation can be felt from the tree,but the use of darker colors and lighter to give the tree a scale and balance work wonderfully here. Its a wonderful piece,and how it came out is just amazing!
Critique: Very nice. I noticed near the bottom with the grass, most of them are leveled, but one part is much larger than the rest. Usually if that proportion of something was not done on purpose, its okay to bring the rest of it to the same level as the mistake. Also, the tree sticks out in front of the grass, when averagely there is still some grass slightly covering the stump of the tree.There are a few different shades in the sky I noticed, but that's perfectly fine. For the branches on the tree, most of the time they aren't that curved/rounded. So try to give them more of a line shape. Take lightening for example. When I draw branches, I think of lightening because the shapes are somewhat similar. Yet great work.