My code for these games.

HTML is the complete basics. It allows the website to be a website. You can make a fairly boring website using only HTML, but it is still a website. It also contains any text you want to put on your website.

Javascript  adds functions to the website. In the breakout game, it allows the paddle to move as the user tells it to and allows the ball to move automatically. 

CSS makes the website look professional. Without CSS, the website will still run but it will be less appealing. 

All of my games use all 3 of these programming languages. To see this in action, see one of the subpages of this page.