I absolutely love the idea and how you implemented it. If you were to do more with that project, I suggest adding more resources growing on the whale. Like his belly could be paller due to having abudnant mushrooms, it can have a spiky tail due to tree like branches growing from it, changing the colour of branches for them being poisonous or not. Stuff like that is really fun to come up with, the art on it's own also is amazing.