Merge pull request #16 from blzaugg/master

master
Add player sprite
Merge pull request #17 from blzaugg/master

master
Add background sprite
Merge pull request #18 from blzaugg/master

master
add controls to ray
Initial sound files
Merge pull request #19 from mjbradford89/master

add controls to ray
Merge pull request #20 from ethanbustad/sounds

Initial sound files
Allow diagonal movement
Source formatting
Add ray gun audio
Merge branch 'pr-21'
Fix screenheight bug
Re-add screen size variables
Background & Ray image update