left player: AI right player: up arrow & down arrow modifiers change every round small paddles: paddles are smaller big paddles: paddles are bigger slippery paddles: paddles slip and slide flappy paddles: paddles jump up and down paddle jump / paddle speed: initial speed of the paddles paddle acceleration: how fast the paddles increase in speed ball speed: initial speed of the ball ball acceleration: how fast the ball increases in speed invert: paddles move in the opposite direction ghost ball: ball slowly fades out until it hits a paddle
Almost all code by @Penguinsareus. Left player code (Except paddle size code) by me.