Hmm...
It need more colours in the grass detail other than GREEN... Try using some flowers or something...
The NPC tree is acctually used correctly for once, congratulations.
There are two tile errors on the house, see on the second floor part, those two green specks? there are tiles near the far right of the tileset with black specks instead of green, it will look better with those...
All in all I really like this level so far! Keep working on it.
7/10 (for now
)