(I'm no expert, but I just thought about this)
The way you have painted the grass is well done, partly because the smooth lining makes it more distinguishable from the trees's leafs and the puddles on the ground.
It might be an idea to give the sky a certain recognizable texture too, to help it stand apart from the other 50% of this picture that is drawn with 'swipes' (which looks good!).
A possible upside to this is that a certain drawing style only being used on objects close to the person (trees, puddles) could add some more dimension too.