I liked that you had both "couch" co-op and against AI, and appreciated that you took into account the paddle vertical speed to put more angle on the ball. It's been so long since I played pong I can't remember if it was pong or break-out that also had more angle put on the return if you caught the ball at the very edge of the paddle vs the middle of the paddle. I would have like to have seen, in the middle of the screen, text explaining how to get the initial ball moving (was it just a timeout, or did I need to spam some keys to get the ball to finally move? I was trying the ENTER key to get it to launch). I think I would have liked to have the ball travelling faster in the serve, as the first couple returns were a bit of a slow pace.