Someone needs to make a list of all of these one-line text games. Here goes:

ABaroids: http://www.thegillowfamily.co.uk/

Blob jump¹²: https://gist.github.com/bsawyer/bc0cb3ec3a86b29e76a23104fc44...

Glutton C¹: https://gluttonc.chesterdoran.com/

Bonus: Defender of the Favicon³: http://www.p01.org/defender_of_the_favicon/

[1]: Available as a bookmarklet! (see respective sites for details)

[2]: https://news.ycombinator.com/item?id=23420528

[3]: https://news.ycombinator.com/item?id=19262529

Title run has ushered in a new age with a second dimension!