Merge pull request #6 from Cyral/gravity-arrows

Improved gravity arrows and input
Fixed a few small issues, commented some code
Made godmode glow appear the color of character, changed WIDTH and HEIGHT of Player to better naming conventions
Fixed focus bug requiring user to click window before moving for the first time
Merge branch 'master' of https://github.com/Cyral/Bricklayer
Added background block support fully