ADORABLE!
Of course you got a bit confused inside the small eyes, as you said, but it's weird, because the large ones appear like you have totally understood the concept: Inside concave, outside (specular highlight) convex. The small eyes have the correct (or consistent) highlights, but the inside is almost arbitrary. Still looks enormously cute!
The clouds sure look like it's clouds in the sky, so that works, while it also appears consistently stylized like the wood, which is nice.
The leaves, however, could be a fantastic moment to explore Brush images a bit more.... grrrrrr.... should I actually do a tutorial on this stuff after all? Hmmmm... Anyway, the reason is, because as they are now in your painting, they don't have the same stylization that one sees and feels in the rest. It's hard to tell how they are intended, on top of that, as it's unclear whether they are sloppy individual, big leaves, or if they are sloppy clusters of leaves, hahaha. Sooo, yeah...
Beyond all of that, though, it's instantly cute and has a fantastic vibe altogether. It is curious enough to allow different phases of observation. From the immediate draw to the eyes and thereby inspiring the imagination to see owls, to the curious configuration of the "nest", making one zoom out in the imagination and gradually begin to look at the whole as a motive, which has a really unique design. I like it a lot!
So, yeah, I should do a little brush image school, hehe. Let's see!