This is WAY cool for your first project, wow! There's an old saying..."Don't Boil The Ocean", or even better "How do you eat an elephant? One bite at a time" :D Meaning, you've got a great basic setup here...take *one* aspect of the game that you think needs to improve, and figure out how to do it. Is the camera too fast (or should that be adjustable for the user?), are the controls funky, are the jumps too "stiff"? Pick one and work on that as a mini project!
Be proud of yourself though, and keep on coding!