Control the paddle with your mouse and stop the ball from touching the red line using the paddle. This was the first game ever made in real life. (Its a classic) Also double click the green flag sometimes it gets stuck, I am working on fixing it.
Do not false report this, I made this on my other account. I also helped @tyohiscool edit his pong. Please do go check him out. He is an amazing scratcher that is much better than me and has updated versions of pong.