My entry for the contest.
My idea is based that most of the contestants would like to collect objects. So my game consists to prevent that this players collect their respective objects.
You can move the player(red) sweeping your finger in the desired direction in order to deflect the other players.
If some player collects all his/her respective items, you will lose and start from level zero.
The first level is easy, the second is feasible but the other players now have power. At least for my skills, the third levels seems impossible to me xD. If someone can beat that level, you have my respects.
It can be played on the simulator, but is more fun if a real touch device is used.
I’m not an art guy, so the non-continuous 4 hours were used on the programming of the game. The background were searched outside of the contest. There are “some basic physics” of the game without box2d.
I would liked to add more sounds and more “powers”, but the time ran so fast.
I believe that happened to the other contestants. While you are advancing the time runs normal, but if your have some error, the times run 10x 
In the future, i would like to design more carefully the game before starting the coding. Designing while programming is fun but time consuming. Also, i would like to have at least some basic sounds, in order to add them without losing much time.
The youtube video(due to some strange upload, better if played on 0.5 speed):
http://www.youtube.com/watch?v=q8WJ4FQ-1jg
Screenshots
For the Android users, the apk can be downloaded here:
And finally, the code can be found here:
https://github.com/gareve/EveryoneCollectButMe
Have fun
Gareve
