Blender Game Making Challenge 4

Winner of the BGMC 3, C.A.ligári, has selected the theme for this challenge.
And the theme was "Experimental Gameplay", but since the theme was announced a before the start of the next challenge I changed it a bit. So the official theme for the BGMC 4 was: Experimental Gameplay using water, fire, sand, stone, snow or wind.

This was the first challenge to last 7 days, and challenges are now held once a month.