I created this game in 48h hours for the Ludum Dare #26. It was great fun!
The story is that you have to find the shape that is hidden in the level somewhere (see second screenshot). Now you have to collect all gems (they just look like the ones the shape is composed of) and place them on their correct position on the shape. That's it! But you have to behave "normally" while bringing the gems to their right position otherwise the people will turn into zombies (= red eyes) and hunt you down.
Download it here:http://www.ludumdare.com/compo/ludum-dare-26/?action=preview&uid=15445