Haha it's awesome! I love how you worked with the colored outlines; this makes the colors come out even better!

I learned to draw Jazz by literally tracing Nick's comic that came with the Jazz Jackrabbit 1 booklet when I was a kid. This helped me get a grasp on his style and anatomy so I could draw Jazz free-handedly later on. With this as a solid foundation, I eventually developed my own style over the years. So if you'd like to practice drawing him, this is one way to do it!

Of course tracing is highly discouraged in the artist community for obvious reasons, but as long as you don't post it online and claim the whole thing as your own, it's a perfectly fine way to practice!