Alright I circled some of the things I don't like:
-The blocks goin up are kinda too straight and lined up.
-The deep water, I mean, its like a little stream/river, you find
deep water in oceans >.<
-The fence things don't connect right, try moving the thing up a
tile.
Also, add some more detail, such as some more grass, flowers, the single swamp tiles, mabey a dirt path thing or two
