AirBlast∞ (6 MB exe setup) was winner in the 2005 PGD competition. Written by Eric Grange, it is probably the most advanced GLScene game demo so far.

The source code for Airblast is included in the advanced demos package∞

Here are links to a couple of full size screenshots

Screen 1∞
Screen 2∞
Screen 3∞
Screen 4∞
Screen 5∞

And here is the standard keymapping∞ for AirBlast