Phew. That was intense. Here’s my LD27 entry!
I went for that stealth type game, which was not my first idea but it was an option to do something with “10 seconds” and got opportunity to play around with box2D.
Also I’ve made my own music for the first time 
Game only uses 2 tiles, pretty cool huh?
http://imageshack.us/a/img824/6867/69ga.png
http://imageshack.us/a/img208/9329/1ln8.png
http://imageshack.us/a/img191/3415/x1kd.png
http://imageshack.us/a/img812/2392/oi9o.png
Ludum Dare page: http://goo.gl/PbSx64
Jar: http://goo.gl/0zjX4L
Source code: http://goo.gl/xPwuXe