Really, you did well. But there are a few small things....
1: Nose. The bridge of the nose and forehead are not that flat.
2: Shoulder. The front of the shoulder is not that pointy.
3: Hind paw. There is no bump behind the paw.
4: Ears. The ears are not that rounded.
5: Rump. The rump is smooth.
6: Eyes. The eyes are not that thin.
7: Mouth. The mouth stays strait or even curves down a little.
8: Stomach. The stomach should tuck up a bit even if it's fluffy.
9: Neck. The neck is a little less fluffy.
10: Shoulder blade. The shoulder blade should be less pronounced.
11: Front legs. The front legs are not quite that long.
Other than that, you did an excellent job!!
It also depends on the kind of dog you're trying to portray. For example, a Great Dane and an Akita look nothing alike, so you have to adjust for each breed.
I'm assuming this one is either a German Shepherd or Wolf. Hope this helped!! (I'm going to use these lines as a ref for my new German Shepherd fursonna, if that's ok with you...)
(Images found on Goolge)