the art in this animation is really good! though the hair and other flowing objects on the person could use a few more tween frames on the way back up to help prevent the slight jerking motion i hope this helps a bit :]
It looks absolutely amazing for being "rushed"! If you want any constructive criticism, maybe the clouds could be moving a little slower and the car could bounce a bit more going over the train tracks. But neither of those things takes away from how amazing this is!