Electric Potential Pong. Present demo is a proof-of-concept web game that works in all modern desktop HTML5 compatible browsers; tested in Chrome, Firefox, and IE9. This plays like classic Pong, but the ball is influenced by the background potential: it is repelled from the blue and attracted to the red. The potentials are just PNG images stored at www.dllu.net/pong/data2 and were randomly generated with a MATLAB script except Level 21. Known bugs: The opponent sometimes goes crazy and disappears. I have no idea what causes that to happen but in the Java version it happens less often. The game may also suffer lag spikes on some computers, but again the Java version runs smoother. The source code is available so if anyone wants to look at it, I would appreciate it. I might make a version for Android and iOS this summer, and possibly implement multiplayer and more interesting background potentials.