There are lots of things worth knowing about 140. For one, it's a side project created by Playdead's Jeppe Carlsen, whose previous work includes creating the puzzles for the excellent Limbo. You might also like to know that it's an IGF nominee. Finally, you should know that 140 is going to be at GDC next month, and we are all over it.
Those are good things to know, but what you need to do is watch the trailer right this very second.