Press the green flag (the start button; either the big one or the one just above the upper-left corner of the game) to start. Press space to start the round. Press the a and d keys to move the top rectangle (which is actually a paddle). Press the left and right arrow keys to move the bottom rectangle (also a paddle). Press space to make the ball move. Move the top and bottom paddles so that the ball does not miss the paddles. If the ball misses a paddle, the person controlling the other paddle will get a point, but the person controlling the paddle the ball missed will get the ball. Then you can press space again to make the ball move again. When the ball hits the paddle, the ball will bounce off the paddle and the ball's left-right movement will be influenced by the left-right movement of the paddle the ball hit. When the ball crosses the dashed line, the ball will switch gravity and fall to the other paddle in the opposite direction as compared to the direction the ball fell towards the paddle that just hit the ball. When the ball hits a blue circle on the dashed line, the paddle that most recently hit the ball will get bigger. When the ball hits a red circle on the dashed line, the paddle that did not most recently hit the ball will get smaller. The score below the dashed line is the score of the person controlling the bottom paddle. The score above the dashed line is the score of the person controlling the top paddle. There is no max score a person can have until the game ends; the game will continue indefinitely until the red octagon (the stop button) is pressed. If the green flag (the start button) is pressed after that, then the game will reset.
Song and code by me! All gameplay is intended.