This is really pretty! The only thing I'd mention is that, as an animé fan, pupil-less eyes have a rather negative connotation (spanning a number of possibilities) for me, but I'm sure it's hard to get them in and looking good on a watercolor. Besides, that's just something that arises from my particular background, so you know what? Pay me no mind.
Really, though, I like the kind of gradient effect you have going on, from deeper, cooler colors on the right to brighter, warmer colors on the left. It particularly shows in the grass. It's a nice touch!