So here it is, with still a few bugs but it's kinda funny.
I had the idea, that you could build something up with the boxes and post a Screenshot of it here.
<img src="http://img708.imageshack.us/img708/584/19706394.png">
Controls:
Click : Create Box on Mouse Position
Wheel Up/Down: Size of the Box
1,2,3 : Layer the box is placed
Up/Down Arrow : Regulate Gravity (faster if holding shift)
F2: Reset
0 : Set gravity 0
Exe :
http://www.sendspace.com/file/0rs0me
.cap :
http://www.sendspace.com/file/ozqp5i