Use arrow keys. Once the opponent score gets to 5 it says game over for 5 seconds and then restarts the game. You do not need to click the green flag again. This is by far my best project. Comment your high-score if you get the world record and comment any bugs that you notice! Only play twice in a row and then click green flag again or else it will glitch out. Enjoy!
Thanks to CSFirst. I made up most of it.
