I think this is pretty good as just a short little platformer. I know you've heard it in other comments but the controls definitely needed some work, if you didn't have to aim with the mouse then arrow keys and spacebar would have been fine, although unconventional. The problem comes from where your hands have to be placed to play the game. Overall though, if controls are the biggest issue with the game I think you can confidently say that the game was pretty good and you should be pretty proud of it for a new developer only having 3 days