Adorable art, good worldbuilding, believable characters, nice story, ... good stuff. 
I wish it would get turned into a full fledged volume. 
While it still conveys everything, it's a bit too short in some parts, which in turn make it feel a bit rushed. 
The open-ended ending is nice, since it means the world continues to live even after we're done with reading the story. Or maybe it's just me.