Hi, thank you for the tips, i am going to make the change asap!
Excellent for a first.
One thing though is that if he's running the arms and legs should be opposite on either side. So, if his left leg is out then his right arm should be too, not his left arm. Get it? Just pause yourself in a sprint and compare it to this if it helps. ;)
Reminds me of Jackie Chan in Project A for some reason :D
https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcROkWlZJYpCUbEF3HfA8HW6-fDeuKjpZxX-xFDgvQh5RbFGMJ4-
It's a really cute style. I like it