Wow, you did an excellent job on the floor, but the tree... It just doesn't seem to belong on the scene at all. You could fix the tree leaves, they don't seem to respond to the same lightsource. At that small scale you don't have to highlight every leaf individually, check this as an example. Also, the trunk could use a little more contrast.
Honestly I like the leaves with the colours that way, rather the tree trunk looks wrong, just my perspective.