For a first game, it's not bad. The graphics are fine, the platforms are well placed, and it's simple and easy to understand. The one thing that could use some work is the controls, as well as speed. If you hold down the left or right button for a small amount of time, the ball will go flying across the level. The controls are also very loose: whenever I turned left or right, it felt as if there was a delay between each press.
Overall, not a bad game. Definitely has potential to be something greater though.