I really like the texture on your grass and sand. The dirt looks a little out of place because you can see the spotting and it's the same 2 shapes repeated. Here's a good example of some dynamic or more realistic patterning for the dirt if you're interested in that. Overall, this is really well done, and definitely one of the better assets I've seen!
https://www.spriters-resource.com/game_boy_advance/pokemonemerald/asset/18614/