Brick-Breaker | A OpenGL C Mini Project of Brick Breaker

I'm making a brick breaker game and I'm stuck on getting the repaint() method working. I've used the debugger and it's not calling the paintComponent method. I am trying to get the paddle to move left or right when the left/right arrow keys are pressed. Hence I am trying to repaint the graphics, but have no luck in it working and can't figure out what I'm doing wrong.

My main class:

I'm trying to build brick-breaker game, however, the paddle does not show up. Seems like this.position.x, this.position.y, this.width, this.height is undefined..does anyone know why?? please help

So for background I am trying to make my first game, its basically a 3d brick-breaker style game. My questions are more design related any help would be greatly appreciated!

I have created a collection of basic cubes that form a larger shape parented these to an empty game object. Then I have a sphere/ball that can collide with the cubes and destroy the cubes it comes in contact with as expected.

Now, what I was hoping to do is under different situations have the ball do more damage ie. destory more cubes. I have tried increasing the size of the ball - this works to some degree but depends on the angle of impact. I have also tried instantiating another sphere at the point of impact to trigger more collisions. This doesnt appear to have must effect.

I am sure there must be an obvious answer to this. How do I increase the "impact" area of the ball/sphere ? Is there a way to have it keep moving in the same direction until it has destroyed a number of cubes?

I have all collider materials set with bounce of 1.