Change Game Resolution

Changes the game from 640x480 with no artificial pixellation to 448x448
with 2x zoom.
Fix Errant Curly Brace

I've been programming in Google C++ Style too long. Haxe's preferred
style is to put braces on their own line.
Hero in a Pit

Adds a controllable player object with some preliminary physics and a
pit to keep it from falling offscreen.