A very good experience that depicts the highs and lows of life in game form. Some small suggestions is that for the first level it would be cool if you were able to change the music to a slight upbeat version when you are at the top of hill, and then to a more depressing when you are at the bottom. I think that the musical shift would have a cool effect as you roll down the hill. This would add to feeling of slowly going up the hill to feel happier then crashing back down to depression. From a mechanic standpoint, I would add some air control for the ball after jumping. Other then that, great job!