Couple of things: The movement needs to be much smoother. At the moment, the ball moves like it's an a pixel-pushing RPG, moving like a charecter would in blocks. Think of physiscs like JMTB02's Ball Revamped.
Second, it get's repetative very quickly. Perhaps speeding the bars up as often happens in these kind of ball drop games.
You could perhaps put in power-ups such as 'Slow Down', 'Freeze' or 'Obliterate Blocks' etc. These could be good as well as bad.
DK444
 "Choose your 2012"){kind=icon}
 "Rapid Roll"){kind=icon}