Matrix 2 - Js+Canvas(html5)
Move your mouse, hold mousebutton to increase power

A variation of the first one.

Note. You need a modern browser for this to run somewhat decently, like the way it is intended.
For example. Google Chrome 7+, Internet Explorer 9+, Firefox 4+ or Opera 10+. Not tested at all on mac.

(C) OutsideOfSociety 2010.