Now featuring buzz-saw boundaries (72% more intimidating than caution signs). Buzz-saw SVG courtesy of theFrankes.com (http://www.thefrankes.com/wp/wp-trackback.php?p=1864) (CC BY-SA 3.0 US); Hearts, snake segments, and boundaries now fade in on new game. The game begins when all objects are fully opaque; When a heart is generated, move it to the lowest z index. Iterate over counters each move cycle and ensure they have higher z indexes on the layer than the hearts and snake segments. snakeMove() is no longer a prototype of Config(). More refactoring of Config() variables.