I like the boy's arms, they really look he's balancing his body weight on the hover board with not much care but a sense of fun and happiness :D.
                     
Not sure how he can feel so good being on top of a flying board with no protection, but I assume that's normal for characters in stories. Not so much for real people, I guess my dislike for flying seeps through lol xD.
                   
Not sure if the perspective is wrong, but the drawing looks pretty fine for me :D.