Sean suggested that we mess around with the code and see what we could do. Sean’s original version (play it here, or read the code here) worked on my Android phone okay but I thought I could make it work better. I made the design more responsive by setting up the board, paddle and ball dimensions dynamically based on the browser’s window size. I thought a softer color scheme would be easier on the eyes so I deviated from the original Pong look and made the colors less intense and rounded off the corners of the boxes.
I wanted to be able to choose to play on the right or the left of the board. That worked out pretty well and I think it makes it much easier to play on a mobile device.