Turn Any Webpage into a Playable Game of Asteroids

Redditor erikperik created a most excellent JavaScript bookmarklet that lets you turn any webpage into a playable game of Asteroids. And in this case, “playable” means “you can fly around blowing up HTML by shooting at it.” On longer, top-down pages, the ship even scrolls down with you.

Controls: (via erkie.github)

Steer with the arrow-keys.
Shoot with space.
To activate click the bookmark once on your webpage of choice.
Can’t see your remaining enemies? Then press and hold B

Click this link to commence blasting at Geekosystem, and bookmark it to use on any page.

(erkie.github via Waxy | Asteroids bookmarklet)