First thing I would say is to get a little more red in the skin tones. Even if it doesn’t look red, skin tones are predominately within the red color channel. The color of the road looks nearly the same as the skin tones.
As for the grass, it looks like you missed a little bit of it, down by the guy’s left hip. Try to add a little bit of yellow mixed in with the green. Grass is darker near the root and lighter towards the top, if you can, try to mimic that. Another thing to think about is desaturating the green as it looks a little radioactive to me.
You might want to tweak the saturation of the water, but you also might find that it is alright after you’ve made other changes.
Mac Hanaman