Nice idea, but there's a bug. Using the cursor keys controls both Mario and the camera, so for example when I press the right cursor key sometimes Mario moves,

Nice idea, but there's a bug. Using the cursor keys controls both Mario and the camera, so for example when I press the right cursor key sometimes Mario moves, sometimes the camera moves. Of course the correct behaviour is for the cursor keys to only control Mario, and the camera position to be determined by Mario's position on screen. I'm using Firefox 32.0.3 (i.e. the latest stable build).