I really think this map has potential to look very cute! Maybe if you are not too good at organics, the simple blocky animals like in minecraft would be alright. I also recommend randomizing the floor with some green wool and green concrete powder along with some grass so it doesn't look too flat. Some Rocks and Bushes will also make the map a bit more fuller.
View attachment 224652 The terraforming on the small waterfall looks very lovely and I recommend adding more around the sides. Also the wall looks a bit bland, I think it would be nice if you add simple pixel art like this
View attachment 224651
It could really make the map much more Lovelier.
That's all! Amazing job so far!