Try my best!
I guess many of the problematic stuffs have been said
1. Text does not leaves screen
2. Repetitive gaming
3. Boring gaming
4. High scores list
5. Main Menu
6. Instructions sheet
7. Maybe the music??
What i would suggest is to imbue in some more features that is above listed...
Maybe a level system that would determine that ball re-appearing speed, and take away the irritating text when the game starts.
But still this game is still fine, the old gameplay mechanics that has been there for a very long time....Try improving the errors though!