In the old days, when you were waiting for a video to load, pressing the down arrow key would bring up a simple snake game that you could play while watching the video.

I made this extension to bring that feature back. Press S to start the game, then ASDW to play. You can also press "Q" to change the colour (to keep it visible on different backgrounds), or "E" to see your current and maximum score.

It's available in the Firefox addons store, for Chrome you will have to install it manually.

Have fun with it!