trying to learn the basics of the pygame module
- prev_winner getting the ball doesn't work since prev_winner gets reset to random.randint(1,2) everytime main() is called
- handle_ball function doesn't work for some reason, only works when the code is copy pasted into the main while loop
- collision is buggy -- ball goes through paddles randomly (mostly on paddle_2)
- hit sound plays more than once per hit
- make it so the path of the ball is determined by where the paddle hits it
- Make GUI (main menu)
- slider to be able to change speed/ size of paddles and ball
- button to customize background
- choose whether to have rounds or infinite
- choose whether the ball speeds up per hit or is constant
- add # of rounds in main game
- Machine Learning co-op mode bot
- multiplayer implementation