Bouncing Ball!

Answer

I hope you answered something like: That code adds three to enemySpeed when the score equals zero.

Maybe you were thrown off by the interesting bit of code here:

score==100 is not a typo, and it's not really some sort of "trick" code. It's simply how it's done!

Say we had:

if(score=100){
}

That code would not check if score was equal to one-hundred. Rather, it would immediately set score equal to 100. And it would stay there. At 100.