You should implement kind of "rockets" to shoot from the players bar.
The level is too dark, lighten up the level, and decrease the strenght of the shadows (more transparency).

the Balls are too hard to see, there should be more contrast to the backround. (making the balls colored)

Some more different stones. Like Stones, that drop items, that you need to catch, or stones, that
you have to hit twice in 10 seconds, or else they will not get removed.

Maybe controlling 2 bars, one in the lower part, and one in the higher part.

Currently it is just a simple akanoid clone, you need to introducr something special, to
make it stand out of other akanoid clones.

You pricing should be much lower.... 20$ for an akanoid clone?
got with the 10$ range....