I love love love your logo (or I suppose you could call it a profile photo as well). However, I don't like the color of your text in the channel art. It's difficult to read with the background you chose. Also, if you have a galaxy in the background of your profile pic I wouldn't have a galaxy in the background of your channel art. I suggest you maybe choose a basic color for the background of one of the two.
(On a side note your account looks really cool and I subscribed. Your golden retriever may actually be one of the cutest golden retrievers ever.)