Onward!

There has been some advance in today's work on Breakout. The ball now bounces at an angle
when it hits the sides of the window, or the paddle.

The key observation here is that, in a collision, the width or height velocity will change sign,
but not both at the same time. If it did, our ball would merely go front and back monotonously.

I am worried about the erratic movement. Here is the test paddle looks like: