Elizium Lemmings - Menu
When I was a youngster, I used to play this goofy computer game called "Lemmings". Basically, in each level, a bunch of lemmings start falling out of the sky, and all they do walk to the right. If there are barriers, they bounce off, and if there are pits, well, they're lemmings, and they plunge to their death. Your job is to assign particular lemmings roles (i.e. "Builder", or "Digger") in certain parts of the level, with the goal of getting a certain percentage of the lemmings to the end of the level.
It was a really awesome game with a very unique premise. And now, someone has implemented it using fancy web browser teknologies! (link above). AWESOME.