Thank you Mirak for the review!
You're totally right: PONG is a very good learning material for any aspirant game developer. Coding it from scratch maximizes the amount you learn from this classic. And doing so under a very tight schedule (here 10 hours) is an excellent exercise in planning and cutting down features.
Cut 1: The paddles were supposed to be white rectangles but I couldn't figure out how to do that in a reasonable amount of time so I used outlines.
Cut 2: The opponent was supposed to be able to rotate his paddle to trick the player.
Cut 3: The ball was supposed to be able to rotate and bouncing would take the rotation speed into account.
With so many features cut out of such a small project, I'm actually surprised to receive above average score but thank you :-)