I like it - it has a very groovy, classic top-down action-rpg look to it. Sort of along the zelda bent. I'd suggest, if I might, to also design a tiling pattern for your trees, using the same parts, so that you can easily fit many together. And lots of other debris, of course. It's a great start, and I'm interested in seeing where it is you plan on taking this.
One thing that does come to mind, is your character has a very well-defined black border, while the tree doesn't. This isn't necessarily a bad thing, as it does distinguish your character from their surroundings, but for consistency, you may want to alter either the character sprite, or the outer edge of certain elements.