Following ball up and down is distracting.
A time limit? On a pinball game? Please. What's next, having to register a username and password to play your pinball game?
"Unlocking"... no thanks. That's a lame trick to get people to play your game again. If you want me to play your game tomorrow, make a good game.
Following the ball up and down is distracting. Compare your game to the Windows pinball game, and look at the positive and negative aspects of both games.
Your game did have nice graphics for a pinball game, but it's not worth the trouble.