The hump look pretty good I think but I would check the negative space between hump and neck, it seems a bit wide. The top of head is a little low compared to the top of the hump. If you drew a line from one to the other it seems like it should angle done to the right more. The only other thing I noticed was the belly. If you think of it as a 1/2 moon, it looks like it's leaning to the right more than in the reference.