Wow, you must've been feeling so inspired when you drew that background! Everytime I see warm lightining like that (not forgetting to mention the sky's color scheme, which is wonderful in my opinion) I can imagine all the feels going though the artist's heart. All the compositions together on the BG are telling the viewer you had to "fly" all over that ocean in your mind to get this done.
I also like how you colored the characters with a bit darker colors in relation to the background (But I think you could've explored that a little more by adding some more shading and giving them some more volume, they look a little bit flat).
I always loved your linearts, I wouldn't change anything about it XD
And to finish, here's a normal comment I would leave here:
It's so cUUUUUUUUUUUUUTE