I love how this is similar to a panoramic picture, like the world is in dimensions but then it's all being crushed together to create a one layer and it almost looks like the picture on the sides is caving in and it just has this certain quality to it that makes it feel like a panoramic.
I also like how you didn't make the river just one big straight line, whether it be more or less straight or truly straight.
I feel like the one fish is a bit unrealistic simply because there are no other fish and there's no splash around it where it's coming out of the water. In my opinion fish don't just sit there, they jump up out of the water. But I do like the fins. I'm not the best at fins....for now.
I like the fairy-tale aspect this takes on, how it's not just 'oh this has to look like a picture,' but it looks like a drawing. In my view, those types of drawings are slightly harder to find because everyone wants to draw photographs and not drawings. (It makes sense in my mind)
Overall, I would give this about a 4.99 out of 5 stars. The only thing I don't like is the fish just kinda sitting there. But that's me, and everything else is amazing! Love this!