Landing a spacecraft on the surface of Mars.
Play the game: http://js13kgames.com/entries/70-seconds-of-terror/
Code built for the js13kgames competition on august-september 2012.
The uncompressed code is 100% warning-free on http://jslint.com :)
The name of the game comes from the original NASA mission called "Curiosity's Seven Minutes of Terror".
See this video for details: http://youtu.be/ISmWAyQxqqs
Check out this infography: http://www.jpl.nasa.gov/infographics/uploads/infographics/10776.jpg